Two proposals in this PR: Python 3.4 support and Exposing current tab instance in template

Both commits are independent (even though consecutive and you can merge both if your like them), both cover testing and documentation independently. Hope you accept them :)

In any case, thanks for your nice project.
The parent class of this view is ``TemplateView`` which uses the ``ContextMixin``. This adds an instance of the view to context as variable ``view``. So this is simply a duplication of the code inside ``ContextMixin``. If this would be documented there wouldn't be the need to expose the view under a different name.