in readme describe where this derives from

README.md

@@ -0,0 +1,8 @@
+This lesson is a mashup of the following sources:
+- https://github.com/coderefinery/reproducible-python (and derives from its history)
+- https://github.com/coderefinery/python-progression
+
+The lesson uses the following example repository:
+- https://github.com/workshop-material/classification-task
+
+Which has replaced the "planets" example repository used in the original lesson.