Set django-fitler requirement to be 0.11.0 and above

Author: Ryan P Kilby

setup.py

@@ -46,7 +46,7 @@ def get_package_data(package):
     #test_suite='rest_framework.runtests.runtests.main',
     install_requires=[
         'djangorestframework',
-        'django-filter',
+        'django-filter>=0.11.0',
     ],
     classifiers=[
         'Development Status :: 5 - Production/Stable',