I wanted to bring my mecanim character based on the mecanim tute into another project, finally figured out that the .meta files were
necessary. But I only got .meta files when I ran the Mecanim_Tute project, when I made a separate test project, no meta files were
generated. I forgot about the meta files and just copied from my test project, this hoses all the animation names, and
I had to rebuild the animation clips.
Yes, they’re generated automatically by turning on the ‘External Version Control’ support via Edit->Project Settings->Editor Settings.