Add auto folder render depth option (#166)

Fixes #165

Makes the default `render_folder_depth` setting to be `auto`, which will render folders up to any open folders in the window.

TodoReview.py

@@ -277,8 +277,16 @@ def draw_results(self):
 	def draw_file(self, item):
 		if settings.get('render_include_folder', False):
 			depth = settings.get('render_folder_depth', 1)
-			f = os.path.dirname(item['file']).replace('\\', '/').split('/')
-			f = '/'.join(f[-depth:] + [os.path.basename(item['file'])])
+			if depth == 'auto':
+				f = item['file']
+				for folder in sublime.active_window().folders():
+					if f.startswith(folder):
+						f = os.path.relpath(f, folder)
+						break
+				f = f.replace('\\', '/')
+			else:
+				f = os.path.dirname(item['file']).replace('\\', '/').split('/')
+				f = '/'.join(f[-depth:] + [os.path.basename(item['file'])])
 		else:
 			f = os.path.basename(item['file'])
 		return '%f:%l' \

readme.md

@@ -169,6 +169,8 @@ Additionally, if you choose to include folders in your report, you may also spec
 "render_folder_depth": 5
 ```
 
+If you are using Sublime in a project or have folders open, you may find it helpful to set `"render_folder_depth"` to `"auto"`, which will render folders in the report up to any folders you have open. For example, if you're working on a project rooted at `/home/user/code/project`, and you have a TODO in `/home/user/code/project/src/file.cpp`, the report would render the file as `src/file.cpp`.
+
 ## Align results
 TodoReview now automatically aligns the comments for you, calculating the largest result and aligning the rest accordingly. The system default for maximum spaces is `50`, which prevents a single file with an abnormally long length completely ruining your results. You can change this setting by editing `render_maxspaces`