Merge pull request #6 from wesleykendall/develop

Data Schema takes a field type argument
Merge pull request #8 from wesleykendall/develop

data schema uses better type checking methods
Merge pull request #10 from wesleykendall/develop

fixed build error
Update convert_value.py
Merge pull request #13 from wesleykendall/develop

data schema uses only datetime objects, even when the field type is a da...
added the get/set value methods on the data schema
Merge branch 'develop' of github.com:ambitioninc/django-data-schema into develop
bumped version