Removed code duplication from ViewSetIntrospector._resolve_methods
Added Response code and message support (a partially fix for #37)
Internal overhaul to add support for complex fields and added enum type for choice fields.

Added ModelGenerator for fields are use are Serializers
Added SerializerIntrospector for clearer code
Added BaseMethodIntrospector.get_parameters was renamed and moved to DocumentationGenerator.

Also reworked the paramaters and model json to be cleaner and more up to date with swagger.
Post documentation information is no longer ignored
Merge branch 'rst-response' of git://github.com/boekkooi/django-rest-swagger into feature/docs-rst