Remove Python 2.5 from trove classifiers

Despite the fact that Django 1.4 supports Python 2.5, we cannot test for it on Travis-CI. Will need to update the PyPi release to v0.4 to fix completely.

Author: michaeljohnbarr

setup.py

@@ -35,7 +35,6 @@
         'Operating System :: OS Independent',
         'Programming Language :: Python',
         'Programming Language :: Python :: 2',
-        'Programming Language :: Python :: 2.5',
         'Programming Language :: Python :: 2.6',
         'Programming Language :: Python :: 2.7',
         'Programming Language :: Python :: 3',