CS4455/CS6457 Mecanim Tutorial
Original source: http://files.unity3d.com/will/MecanimTute.zip
Look under Assets/Finished/Scenes/ for Tutorial-done and CS4455_Demo
Here is a video that goes with the tutorial: Mecanim Tutorial Video
There are some fixes for going from Unity4 to Unity5, which I have already applied to the project hosted here. Useful fixes discussed in the youtube comments in link above (seriously!).
Jeff