diff --git a/.gitignore b/.gitignore
index 5343563bc..e5a65d9f1 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,4 @@
+.gitattributes
 models/
 tmp/
 *.bak
diff --git a/06_multicat.ipynb b/06_multicat.ipynb
index 5c39deddf..deeb28ef6 100644
--- a/06_multicat.ipynb
+++ b/06_multicat.ipynb
@@ -2,7 +2,7 @@
  "cells": [
   {
    "cell_type": "code",
-   "execution_count": 1,
+   "execution_count": null,
    "metadata": {},
    "outputs": [],
    "source": [
@@ -14,7 +14,7 @@
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-   "execution_count": 2,
+   "execution_count": null,
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@@ -85,7 +85,7 @@
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-   "execution_count": 3,
+   "execution_count": null,
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@@ -102,7 +102,7 @@
   },
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-   "execution_count": 4,
+   "execution_count": null,
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     {
@@ -175,7 +175,7 @@
        "4  000016.jpg       bicycle      True"
       ]
      },
-     "execution_count": 4,
+     "execution_count": null,
      "metadata": {},
      "output_type": "execute_result"
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@@ -210,7 +210,7 @@
   },
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+   "execution_count": null,
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@@ -230,7 +230,7 @@
        "Name: fname, Length: 5011, dtype: object"
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-     "execution_count": 5,
+     "execution_count": null,
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@@ -241,7 +241,7 @@
   },
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+   "execution_count": null,
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@@ -253,7 +253,7 @@
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-     "execution_count": 6,
+     "execution_count": null,
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@@ -274,7 +274,7 @@
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+   "execution_count": null,
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@@ -294,7 +294,7 @@
        "Name: fname, Length: 5011, dtype: object"
       ]
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-     "execution_count": 7,
+     "execution_count": null,
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      "output_type": "execute_result"
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@@ -312,7 +312,7 @@
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+   "execution_count": null,
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    "outputs": [
     {
@@ -361,7 +361,7 @@
        "1  2  4"
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-     "execution_count": 8,
+     "execution_count": null,
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@@ -373,7 +373,7 @@
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+   "execution_count": null,
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@@ -425,7 +425,7 @@
        "1  2  4  6"
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-     "execution_count": 9,
+     "execution_count": null,
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@@ -498,7 +498,7 @@
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@@ -514,7 +514,7 @@
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@@ -530,7 +530,7 @@
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+   "execution_count": null,
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@@ -539,7 +539,7 @@
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@@ -550,7 +550,7 @@
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@@ -566,7 +566,7 @@
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@@ -585,7 +585,7 @@
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@@ -594,7 +594,7 @@
        "'008663.jpg'"
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-     "execution_count": 14,
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@@ -605,7 +605,7 @@
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@@ -614,7 +614,7 @@
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       ]
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-     "execution_count": 15,
+     "execution_count": null,
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@@ -634,7 +634,7 @@
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+   "execution_count": null,
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@@ -643,7 +643,7 @@
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+     "execution_count": null,
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@@ -672,7 +672,7 @@
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+   "execution_count": null,
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@@ -681,7 +681,7 @@
        "(Path('/home/jhoward/.fastai/data/pascal_2007/train/002844.jpg'), ['train'])"
       ]
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-     "execution_count": 17,
+     "execution_count": null,
      "metadata": {},
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@@ -703,7 +703,7 @@
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-   "execution_count": 18,
+   "execution_count": null,
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     {
@@ -713,7 +713,7 @@
        " TensorMultiCategory([0., 0., 0., 0., 0., 0., 0., 0., 0., 0., 0., 1., 0., 0., 0., 0., 0., 0., 0., 0.]))"
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-     "execution_count": 18,
+     "execution_count": null,
      "metadata": {},
      "output_type": "execute_result"
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@@ -748,7 +748,7 @@
   },
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    "cell_type": "code",
-   "execution_count": 19,
+   "execution_count": null,
    "metadata": {},
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     {
@@ -757,7 +757,7 @@
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       ]
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-     "execution_count": 19,
+     "execution_count": null,
      "metadata": {},
      "output_type": "execute_result"
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@@ -778,7 +778,7 @@
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-   "execution_count": 20,
+   "execution_count": null,
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     {
@@ -788,7 +788,7 @@
        " TensorMultiCategory([0., 0., 0., 0., 0., 0., 1., 0., 0., 0., 0., 0., 0., 0., 0., 0., 0., 0., 0., 0.]))"
       ]
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-     "execution_count": 20,
+     "execution_count": null,
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@@ -819,7 +819,7 @@
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@@ -840,7 +840,7 @@
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@@ -890,7 +890,7 @@
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+   "execution_count": null,
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@@ -906,7 +906,7 @@
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    "cell_type": "code",
-   "execution_count": 24,
+   "execution_count": null,
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     {
@@ -915,7 +915,7 @@
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-     "execution_count": 24,
+     "execution_count": null,
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@@ -935,7 +935,7 @@
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-   "execution_count": 25,
+   "execution_count": null,
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     {
@@ -945,7 +945,7 @@
        "       grad_fn=<AliasBackward>)"
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-     "execution_count": 25,
+     "execution_count": null,
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@@ -970,7 +970,7 @@
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-   "execution_count": 26,
+   "execution_count": null,
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@@ -1013,7 +1013,7 @@
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-   "execution_count": 27,
+   "execution_count": null,
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@@ -1022,7 +1022,7 @@
        "TensorImage(1.0342, grad_fn=<AliasBackward>)"
       ]
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-     "execution_count": 27,
+     "execution_count": null,
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@@ -1067,7 +1067,7 @@
   },
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-   "execution_count": 28,
+   "execution_count": null,
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     {
@@ -1076,7 +1076,7 @@
        "('Hello Jeremy.', 'Ahoy! Jeremy.')"
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-     "execution_count": 28,
+     "execution_count": null,
      "metadata": {},
      "output_type": "execute_result"
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@@ -1095,7 +1095,7 @@
   },
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    "cell_type": "code",
-   "execution_count": 29,
+   "execution_count": null,
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     {
@@ -1104,7 +1104,7 @@
        "('Bonjour Jeremy.', 'Bonjour Sylvain.')"
       ]
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-     "execution_count": 29,
+     "execution_count": null,
      "metadata": {},
      "output_type": "execute_result"
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@@ -1123,7 +1123,7 @@
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@@ -1238,7 +1238,7 @@
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+   "execution_count": null,
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@@ -1257,7 +1257,7 @@
        "(#2) [0.10477833449840546,0.9314740300178528]"
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-     "execution_count": 31,
+     "execution_count": null,
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@@ -1276,7 +1276,7 @@
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-   "execution_count": 32,
+   "execution_count": null,
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@@ -1295,7 +1295,7 @@
        "(#2) [0.10477833449840546,0.9429482221603394]"
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-     "execution_count": 32,
+     "execution_count": null,
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@@ -1314,7 +1314,7 @@
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+   "execution_count": null,
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     {
@@ -1341,7 +1341,7 @@
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-   "execution_count": 34,
+   "execution_count": null,
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     {
@@ -1350,7 +1350,7 @@
        "TensorImage(0.9567)"
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-     "execution_count": 34,
+     "execution_count": null,
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@@ -1368,7 +1368,7 @@
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+   "execution_count": null,
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     {
@@ -1435,7 +1435,7 @@
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-   "execution_count": 36,
+   "execution_count": null,
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@@ -1444,7 +1444,7 @@
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-   "execution_count": 37,
+   "execution_count": null,
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@@ -1461,7 +1461,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 38,
+   "execution_count": null,
    "metadata": {},
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     {
@@ -1470,7 +1470,7 @@
        "(#50) [Path('01'),Path('01.obj'),Path('02'),Path('02.obj'),Path('03'),Path('03.obj'),Path('04'),Path('04.obj'),Path('05'),Path('05.obj')...]"
       ]
      },
-     "execution_count": 38,
+     "execution_count": null,
      "metadata": {},
      "output_type": "execute_result"
     }
@@ -1488,7 +1488,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 39,
+   "execution_count": null,
    "metadata": {},
    "outputs": [
     {
@@ -1497,7 +1497,7 @@
        "(#1000) [Path('01/depth.cal'),Path('01/frame_00003_pose.txt'),Path('01/frame_00003_rgb.jpg'),Path('01/frame_00004_pose.txt'),Path('01/frame_00004_rgb.jpg'),Path('01/frame_00005_pose.txt'),Path('01/frame_00005_rgb.jpg'),Path('01/frame_00006_pose.txt'),Path('01/frame_00006_rgb.jpg'),Path('01/frame_00007_pose.txt')...]"
       ]
      },
-     "execution_count": 39,
+     "execution_count": null,
      "metadata": {},
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@@ -1515,7 +1515,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 40,
+   "execution_count": null,
    "metadata": {},
    "outputs": [
     {
@@ -1524,7 +1524,7 @@
        "Path('13/frame_00349_pose.txt')"
       ]
      },
-     "execution_count": 40,
+     "execution_count": null,
      "metadata": {},
      "output_type": "execute_result"
     }
@@ -1544,7 +1544,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 41,
+   "execution_count": null,
    "metadata": {},
    "outputs": [
     {
@@ -1553,7 +1553,7 @@
        "(480, 640)"
       ]
      },
-     "execution_count": 41,
+     "execution_count": null,
      "metadata": {},
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@@ -1565,7 +1565,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 42,
+   "execution_count": null,
    "metadata": {},
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     {
@@ -1575,7 +1575,7 @@
        "<PIL.Image.Image image mode=RGB size=160x120 at 0x7F2DF0A49690>"
       ]
      },
-     "execution_count": 42,
+     "execution_count": null,
      "metadata": {},
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@@ -1593,7 +1593,7 @@
   },
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    "cell_type": "code",
-   "execution_count": 43,
+   "execution_count": null,
    "metadata": {},
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    "source": [
@@ -1614,7 +1614,7 @@
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   {
    "cell_type": "code",
-   "execution_count": 44,
+   "execution_count": null,
    "metadata": {},
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     {
@@ -1623,7 +1623,7 @@
        "tensor([384.6370, 259.4787])"
       ]
      },
-     "execution_count": 44,
+     "execution_count": null,
      "metadata": {},
      "output_type": "execute_result"
     }
@@ -1645,7 +1645,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 45,
+   "execution_count": null,
    "metadata": {},
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    "source": [
@@ -1675,7 +1675,7 @@
   },
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+   "execution_count": null,
    "metadata": {},
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@@ -1705,7 +1705,7 @@
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   {
    "cell_type": "code",
-   "execution_count": 47,
+   "execution_count": null,
    "metadata": {},
    "outputs": [
     {
@@ -1714,7 +1714,7 @@
        "(torch.Size([64, 3, 240, 320]), torch.Size([64, 1, 2]))"
       ]
      },
-     "execution_count": 47,
+     "execution_count": null,
      "metadata": {},
      "output_type": "execute_result"
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@@ -1740,7 +1740,7 @@
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-   "execution_count": 48,
+   "execution_count": null,
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     {
@@ -1749,7 +1749,7 @@
        "TensorPoint([[-0.3375,  0.2193]], device='cuda:6')"
       ]
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-     "execution_count": 48,
+     "execution_count": null,
      "metadata": {},
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@@ -1788,7 +1788,7 @@
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+   "execution_count": null,
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@@ -1804,7 +1804,7 @@
   },
   {
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-   "execution_count": 50,
+   "execution_count": null,
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@@ -1822,7 +1822,7 @@
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-   "execution_count": 51,
+   "execution_count": null,
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@@ -1859,7 +1859,7 @@
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   {
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-   "execution_count": 52,
+   "execution_count": null,
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    "outputs": [
     {
@@ -1868,7 +1868,7 @@
        "FlattenedLoss of MSELoss()"
       ]
      },
-     "execution_count": 52,
+     "execution_count": null,
      "metadata": {},
      "output_type": "execute_result"
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@@ -1890,7 +1890,7 @@
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-   "execution_count": 53,
+   "execution_count": null,
    "metadata": {},
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     {
@@ -1909,7 +1909,7 @@
        "SuggestedLRs(lr_min=0.005754399299621582, lr_steep=0.033113110810518265)"
       ]
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-     "execution_count": 53,
+     "execution_count": null,
      "metadata": {},
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@@ -1939,7 +1939,7 @@
   },
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    "cell_type": "code",
-   "execution_count": 54,
+   "execution_count": null,
    "metadata": {},
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@@ -2027,7 +2027,7 @@
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-   "execution_count": 55,
+   "execution_count": null,
    "metadata": {},
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@@ -2036,7 +2036,7 @@
        "0.01"
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-     "execution_count": 55,
+     "execution_count": null,
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@@ -2054,10 +2054,8 @@
   },
   {
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-   "execution_count": 56,
-   "metadata": {
-    "scrolled": false
-   },
+   "execution_count": null,
+   "metadata": {},
    "outputs": [
     {
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@@ -2174,31 +2172,6 @@
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-   "mimetype": "text/x-python",
-   "name": "python",
-   "nbconvert_exporter": "python",
-   "pygments_lexer": "ipython3",
-   "version": "3.7.7"
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-   "nav_menu": {},
-   "number_sections": false,
-   "sideBar": true,
-   "skip_h1_title": true,
-   "title_cell": "Table of Contents",
-   "title_sidebar": "Contents",
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-   "toc_position": {},
-   "toc_section_display": true,
-   "toc_window_display": false
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