Add support for more rest_framework classes, and django_filters

added support for Django REST Framework

Ensure pylint doesn't raise an error on 'raise SomeModel.DoesNotExist'

Fixes #46

This reverts commit ac47132a.

This reverts commit 491644c5.

fix pylint complaints about use of super() on django.db.models.Manager

Using "sudo: false" to use the shiny Docker container version of travis CI (see http://docs.travis-ci.com/user/workers/container-based-infrastructure/)

[refs #37 #40] Fix the infinite loop problem using an inference tip to infer that fields are both their original subclass and also a type shim representing them at runtime. Also, supresses R0903 (too few methods) from models and views, which started happening recently

This reverts commit 653660d0 as it needs to be in a sperate branch/PR

[refs #37] As of astroid 1.3.3, class method resolution order is taken into consideration: https://bitbucket.org/logilab/astroid/commits/b1d8107715a4ceeeeb3f4a9065b67817e8cdc643

This caused an infinite loop when using pylint-django, as the model and form field transforms extended the base Django object then replaced it. This caused the MRO lookup to find a class as its own ancestor.

The model and form field transforms have been simplified, so that instead of building a module and replacing each class individually, instead, the correct "dummy" parent class is simply appended. This means that the original parent node (eg, CharField) is not replaced by itself. This also has the side effect of no longer confusing pylint when it comes to __init__/__new__ differences for field classes which extend "immutable" base classes as a result of this transform.

... subclasses. This is done by exposing a Manager object.
see https://github.com/treyhunner/django-simple-history/pull/134 as well.