Adding support for for setting nullable foreign key fields to null, adding relate-able model Category into the mix, along with a fixture for it. In sprint.ly, Fixes #5285
Making the nullable foreign key check in _extract_data a little cleaner
Simplifying the _extract_data foreign key processing a bit, adding support for nullifying a nullable field by passing 0, None, or false, adding tests for these and more fixture data
Removing explicit checks for None and 0 in _extract_data when checking foreign key field value
Merge pull request #46 from chrisforrette/master

Adding support for for setting nullable foreign key fields to null