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
#2029 - New relation examscore -> examrecordscore

**Note: Migration required for this change.

I'm setting this new relation in 2 instances:

1. Autograded responses. For this the examrecordscore related to is the
one corresponding to the score with penalties excluded.

2. CSV grading. For this, the examrecordscore related to is the one
which is for the latest submission (attempt) at the time of csv upload.
This is because csv grading, as currently works, posts grades to the
last submission for that exam. In this instance, the score on the
examrecirdscore is the same as the examscore as there are no
machine penalties applied with csv grading.

What I have not touched is the regrader. The reason being, that I'm only
setting relations for new submissions, not retroactively. It ought to be
easier to incorporate after current courses have died.
The case where csv grades are being set for a student who has not
attempted this exam yet needs to be handled.
Merge branch 'master' of http://github.com/Stanford-Online/class2go into dca_new_working2
Merge branch 'master' of http://github.com/Stanford-Online/class2go into dca_new_working2
Merge branch 'master' of http://github.com/Stanford-Online/class2go into dca_new_working2
#2298 Added "Username" as column title for Student Scores in-line
report
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 branch 'master' of http://github.com/Stanford-Online/class2go into dca_new_working2
Merge branch 'master' of http://github.com/Stanford-Online/class2go into dca_new_working2
Merge branch 'master' of http://github.com/Stanford-Online/class2go into dca_new_working2
Someone stole my migration placeholder.
Change to s3boto monkeypatch to allow no auth

Change to s3boto monkeypatch to allow no auth - course images and
instructor photos shouldn't have auth strings

Fixed typo for attachment
Merge pull request #2316 from dglance/dglance-s3boto-url

Change to s3boto monkeypatch to allow no auth
Documentation fixes on s3boto monkeypatch