tree 6212305cf8e9731d450175f8b7665635a89fa696
parent de9f24c73ba778437af4918b1ed1d4d6d46e0e0d
author Scott Baker <smbaker@gmail.com> 1423610592 -0800
committer Scott Baker <smbaker@gmail.com> 1423610592 -0800

fix the problems with DiffModelMixin, and eliminate redundant code