Add some more needed packages

- they're in there but aren't used.. yet

requirements.txt

 Django==1.9.4
+django-braces==1.4.0
+django-cas-client==1.2.0
 MySQL-python==1.2.5
+six==1.10.0

uta_apps/settings/settings.py.template

@@ -39,6 +39,7 @@ INSTALLED_APPS = [
     'django.contrib.messages',
     'django.contrib.staticfiles',
     'uta_apps',
+    'cas',
 ]
 
 MIDDLEWARE_CLASSES = [