0.8.1

This release fixes a Django >=1.7 compatibility bug where ORM query lookups would traverse a m2m relationship and incorrectly discover the manager to be a callable value function.

A small translation fix was provided, a wasteful count() query removed, NullBooleanField is now added to the 'boolean' FIELD_TYPES, and we fixed a documentation typo that referred users to the wrong javascript callback name.