[#61] added UserProfile model
[#61] tests for UserProfile init
[#61] implemented UserProfile repr; tests
[#61] implemented UserProfile unicode; tests
[#61] added Userprofile.profile_name
[#61] added UserProfile.get_social_logins
[#61] added simplejson to requirements.txt
[#61] tests for UserProfile.profile_name
[#61] tests for UserProfile.get_social_logins
[#38] added south to requirements.txt
[#38] added south to settings.py
Initial south migrations for apps