upgraded django to the lovely 1.11lts release

requirements.txt

 beautifulsoup4==4.3.2
-Django>1.10, <1.11
+Django>1.11, <1.12
 argparse==1.2.1
 django-allauth==0.24.1
 django-analytical==2.0.0
 django-autoslug==1.9.3
 django-braces==1.8.0
+django-cas-client==1.3.0
 django-crispy-forms==1.6.1
 django-filter==0.12.0
-django-cas-client==1.3.0
 django-gravatar2==1.1.4
 django-haystack==2.5.1
 django-localflavor==1.0
@@ -25,6 +25,7 @@ oauthlib==0.7.2
 pep8==1.5.7
 pyflakes==0.8.1
 python-openid==2.2.5
+pytz==2017.2
 redis==2.10.3
 requests==2.5.1
 requests-oauthlib==0.4.2