tree 6212305cf8e9731d450175f8b7665635a89fa696
parent 24a2a299f31949fdac216d1551774394b81b9eb0
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