Custom model save with highlights

- Adding owner field as well
Add doc strings
Add south for django<=1.6
Purge 1.7 migrations

Will be redone with south and syncdb
Recreated migrations using South
Add South notes
Use in-built auth.User model for snippet owner
Add user endpoint

+ Add api versioning to project URL
+ Standardize User model import
+ Add User serializer and User list CBVs
Simplify snippet serializer
Restrict views with permissions
Add login to browseable API
Add sample snippet to DB
Owner only edit permission
ironman and admin users

ironman / ironman
admin / admin
Merge pull request #2 from sshquack/drf-p4-auth

DRF p4 auth