* updating vendor files
* updating class syntax (to new FA-based classes) for all UI elements
* correcting broken tests

Change third party auth login failure code to a 401, to detect authentication
success with no linked account.

If already authenticated, redirect immediately to the dashboard.

Use "Location" header correctly for 302 redirects from student views.

Add utility functions for simulating a running third-party auth pipeline.

Add a utility function for checking whether third party auth is enabled.

Respect default values sent by the server

The next step in the password reset process (confirmation) continues to be handled by student.views.password_reset_confirm_wrapper, a custom wrapper around Django's password reset confirmation view.

Validate student account and profile form fields. Use RequireJS for Jasmine tests of account and profile JS.

Add Python APIs for account/profile information to user_api
Updating profile page to have social linking

Authors: Renzo Lucioni, Alasdair Swan, Stephen Sanchez, Will Daly