Making email sending multi-site capable

Making email sending multi-site capable

Parameterize email footer adding SITE_URL as a configuration setting
PuMerge branch 'master' of https://github.com/Stanford-Online/class2go into dglance-site-templates
Change Multi-Site to New Structure

Change Multi-Site to New Structure
main/site_templates/Stanford/
also put sites in graphics and styles
Change to Multi-Site

Missed file
Multi-Site Move

Landing Page for UWA
Merge branch 'master' of https://github.com/Stanford-Online/class2go into dglance-site-templates
Merge branch 'master' of https://github.com/Stanford-Online/class2go into dglance-site-templates

Conflicts:
	main/templates/base.html
	main/test_harness/test_base_selenium.py
Merge remote-tracking branch 'uwa/dglance-site-templates' into sef-dglance-site-templates-move
Initial commit for #1671 display visits for new exam objects

  - In-video quizzes are included under the quizzes list
initial commit for adding members
sending email
inviting single email addresses done
adding users via CSV -> celery task
include username in existing user invite email
added preenroll_only functionality
differentiated statement buttons and progress on profile page
cleaned up body.css file for profile page
added python engineer job post with disabled link
fixed some english whoopsies
change python job description a bit (#2341)