separate prod requirements versus local requirements so that they do not conflict with edx-platform

.travis.yml

@@ -13,6 +13,7 @@ sudo: false
 
 install:
     - npm install
+    - "pip install -r local_requirements.txt"
     - "pip install -r requirements.txt"
     - "pip install -r test_requirements.txt"
     - "pip install coveralls"

local_requirements.txt

+# Django/Framework Packages
+django>=1.4.12,<=1.4.22
+django-model-utils==1.4.0
+South>=0.7.6
+djangorestframework>=2.3.5,<=2.3.14
+pytz>=2012h
+pycrypto>=2.6

requirements.txt

-# Django/Framework Packages
-django>=1.4.12,<=1.4.22
-django-model-utils==1.4.0
-South>=0.7.6
-djangorestframework>=2.3.5,<=2.3.14
-pytz>=2012h
-pycrypto>=2.6
+
 
 # Third Party
 -e git+https://github.com/un33k/django-ipware.git@42cb1bb1dc680a60c6452e8bb2b843c2a0382c90#egg=django-ipware