fix doc generation
Merge pull request #11 from gureedo/patch-1

fix doc generation
make @mixin optional again, fixes #7 and relates to #9
documenting behaviors by name fixes #13
fix hiding behavior when no properties exist
Update README.md
Update README.md
Don't add global namespace prefix for model in namespace
Merge pull request #14 from gureedo/patch-555

Don't add global namespace prefix for model in namespace