add university_profile/edge.html for edge landing page

resets branding/views to https://github.com/edx/edx-platform/blob/93cbb2e42201d6fe3edb3054ebf6b2ed6deba8c1/lms/djangoapps/branding/views.py

puts back university_profile/edge.html

basically, if a user is logged out in edge, the user will be presented with edge.html, which is a log in page. This is how it worked before.

@brianhw , @feanil