version 0.7.2: bugfix and add docs/contributors and tests
Adding the version definition in setup file
Adding initial formfield tests and fix some other stuffs like the DateField.
Fixing the cases when the 'to_python' method receive an list, just return him.
Merge branch 'luanfonceca-master'
version 0.7.3 - fix DateFields
Revert "version 0.7.3 - fix DateFields"

This reverts commit ea9568f0c30cb0bffeaeb0bd4dd809a724f535ce.
version 0.7.3 - fix HstoreDateField