Update Django version in tox ini to 1.3.7, 1.4.5 and 1.5
Update Django version in travis conf to 1.3.7, 1.4.5 and 1.5
Merge pull request #168 from mbraak/dev

Thanks Marco!
Deprecation of `get_ancestors_include_self` in favor of MPTT's
get_ancestors(include_self=True).
Since Django 1.5, for some reason static files that are served when DEBUG
is True, no longer have a Content-Type set when when the server tries to
return a `304 - Not Modified`, and thus may result in a
KeyError. This commit fixes that.
Merge pull request #171 from markotibold/static-serve

Fix KeyError in Middleware occurring in Django 1.5
Merge branch 'dev' into multilingual

Conflicts:
	.travis.yml
	testproject/tox.ini
Removed Django 1.3 from tox and travis config because multilingual app does not work in 1.3
Updated version to 0.10.1.2
Updated requirement djangorestframework==2.2.3