* For all files, from __future__ import unicode_literals.
* Add @python_2_unicode_compatible to both models.
* Test six.string_type(obj) for both models.
Also, fix some new pylint warnings and improve model repr methods.
MST-24
Create read-only serializer to handle User/UserProfile data
together.
Refactor GET accounts to use the new read-only joint serializer
Fix tests to check for new expanded user info
Update tests in teams/tests/test_views.py to test for both
public and private profiles on expands user
Update serializer to utilize the request object for creating absolute uris
