Upgrade to latest Django #282

- Both django-registration v0.8 and v1.0 (latest) have some compatibility issues with Django 1.6.5. I chose to install from https://github.com/macropin/django-registration (please find detailed comments in requirement.txt) to start twisting with.

- django-emailmgr v0.9(latest) has compatibility issue with Django 1.6.5. I have to modify 
  local/lib/python2.7/site-packages/emailmgr/utils.py, line 8:
Original code:
    from django.utils.hashcompat import sha_constructor
Modified:
    from hashlib import sha1 as sha_constructor

- A few places in the codes are modified to adapt to Django 1.6.5.