Updating requirements incrementing version to 0.3

Updated to
 * Django 1.7
 * django-rest-framework 3.0
 * and many more

Removed South migrations to use django migrations.
Fixed asset loading

 * Updated config for django-pipeline
 * disabled PhantomJS testing because of
   https://github.com/detro/ghostdriver/issues/202

Enabled debug mode in functional tests to fix django-pipeline