user_api: get username into user object
so it can be used to generate unsubscribe tokens
Change in signature for add_user_with_status_unrequested.
add EDX_API_KEY to aws.py
LMS i18n from Tsinghua
Remove news carousel and other unused pages

Remove unused course_filter page

removes university_profile urls and templates

removes all university_profile views

remove news from templates/index
replace edx with variable substitution

fixes template errors