Merge pull request #274 from edx/feanil/correct_django_requirement

Correct Django Requirement

local_requirements.txt

 # Django/Framework Packages
-django>=1.8,<1.9
+django>=1.8,<1.9a
 django-model-utils==2.3.1
 djangorestframework>=3.1,<3.2
 django-ipware==1.1.0