Conflicts:
	static/js/application.js

Add newrelic handler, rather than custom function to log exceptions

Adds ARIA labels to navigation

This includes calculator open/close button, navigation, profile, and
book's table of content.

First part of courseware refactor

Delete settings.py in favor of envs/*.py, and add a rake task to run a d...

fix multicourse; fix bug in I4xSystem - self.filestore not set when

Don't pipeline in dev environment, which means that there is no need to run collectstatic either. Hooray\!

Delete settings.py in favor of envs/*.py, and add a rake task to run a dev server locally from those settings

Conflicts:
	static/css
	static/css/application.css

to show quickedit when settings.QUICKEDIT is True.  add
mathjax_include.html because that is needed by quickedit.html

filestore not None.  mitxhome.html now properly automatically lists
all courses given in settings.COURSE_SETTINGS.  mitxhome now served
from multicourse.views.  optioninput.html was missing; fixed. cleaned
up access to request.session for coursename in courseware/views.py

More code transitioned to pyfilesystem

Added comments to Askbot stylesheets

Conflicts:
	envs/dev.py

Conflicts:
	envs/dev.py
	sass/README
	static/css
	static/css/application.css
	static/css/marketing-ie.css
	static/css/marketing.css

Specific error handling