Removed templates and static folders form manifest, not used
changed django-jsonfield to jsonfield, which supports python 3, in requirements
set blank=True in jsonfield to allow empty field
Bumped django-model-utils to version 2.0.3
Removed 2to3 from setup.py
Added python 2 and 3 compatibility
Added missing import statement
Merge pull request #2 from Cahersan/master

Merging cahersan branch