Enable timezone support in django

This allows the tests to catch mismatches between timezone aware and
unaware dates.
Use timezone aware dates for UserFixture

This fixes test failures, and allows django-autofixture to import
cleanly into projects where timezone support is enabled.
Merge pull request #26 from theospears/timezone_correctness

Timezone correctness
Fixes bug which causes exception when processed model contains GenericRelation field.
Preparing 0.6.3 release.
Missing comma between to names.
Merge pull request #28 from BertrandBordage/patch-1

Missing comma between to names.
Clarifying docstring for post_process_instance method and adding a commit argument.
Check that commit argument gets passed from autofixture.create to AutoFixture.create correctly.
Allow arbitrary keyword arguments for AutoFixture.create
Make post_process_instance methods that don't have a commit argument deprecated.
Fixes #29 -- Fix UserFixture that didn't use post_process_instance correctly. Thank you to @StillNewb for the report.
Added `base.AutoFixture.pre_process_instance` method, which allows to modify instance before it gets saved to DB.
image_generator
confusion and requirements
imagefield imports
tests for ImageField autofixture
debugging travis
not debugging travis
Fix issue of python 3 ]"non-integer arg 1 for randrange()"] since it uses True division for division implementation