fixes template errors

keep tos untranslated

formatting fixes

Remove unused course_filter page

removes university_profile urls and templates

removes all university_profile views

remove news from templates/index

Adjust the now-defunct landing page so that it doesn't render much
of the edX-specific marketing info (social links, press releases,
university partners, etc.) if a theme is enabled.

Additionally, if the Stanford theme is enabled, add in some school-
specific language and adjust the video modal to play a Stanford one.

LH: 381, 382, 383

[#154]

media kit - added in new tab/window behavior for download links, revised edX name styling on homepage cta, and provided more context on logo download text

[#41872203]

[# 41872203]

[#40805397]

[#39472239]

- use js instead of django to do the redirection

* for more context, see https://basecamp.com/1892446/projects/631155-devops/messages/4719963-strange-caching

* also replace the external-auth-related popping up of the signup form with jquery.
Presumably it takes care of the browser specific stuff.

Actually, the bg play YT bug was there because of the lack of a class on the section. Re-removing the YouTube title.

Reverting the YouTube title hiding commit because it brings back the 'video playing in the background when you hit back' bug