Simplify inheritance instructions when using CreatedModifiedByMixin

[pakal]

The docs state that a full-featured model should be created like so:

class MyModel(BaseModel, RevisionModelMixin, CreatedModifiedByMixin)

However, there seems to be no used for the abstract BaseModel, just doing this ways seems to work so far, since only RevisionModelMixin inherits from Model. The order of both doesn't seem important either.

class MyRecord(RevisionModelMixin, CreatedModifiedByMixin)

Am I missing something ?