Add Django version trove classifiers.

setup.py

@@ -59,6 +59,8 @@ setup(
         'Programming Language :: Python :: 3.3',
         'Programming Language :: Python :: 3.4',
         'Framework :: Django',
+        'Framework :: Django :: 1.7',
+        'Framework :: Django :: 1.8',
         'Topic :: Internet :: WWW/HTTP :: Site Management',
     ],
     install_requires=install_requires,