0.1.4: Use only field's attname for state tracking (#3)

* Compare only concrete and non-relational fields in ChangesMixin

* Revert "Compare only concrete and non-relational fields in ChangesMixin"

This reverts commit b114683e

* Use only field's attname for state tracking

* Bump version to 0.16

0.1.3

Update setup.py

0.1.2: Merge pull request #2 from modsy/add-signal-data

Include signal meta data in post_change