Simple Format for Version in Setup.

This doesn't add up burden while installing which presently gives while installing a fresh in django.
 Traceback (most recent call last):
      File "<string>", line 17, in <module>
      File "/home/iraycd/.virtualenvs/gitpaste/build/django-sirtrevor/setup.py", line 3, in <module>
        from sirtrevor import __version__
      File "sirtrevor/__init__.py", line 2, in <module>
        from django.template.loader import render_to_string
    ImportError: No module named django.template.loader
Better way to represent version is using tuple.
MIT License
Merge pull request #3 from iraycd/master

Simple Setup and MIT License