Merge pull request #271 from edx/dhm/next-gen-modulestore

Next gen modulestore
add back removed space
tests added
tweaks
Merge branch 'master' into ihoover/feature_flag_auto_auth
comment tweaks
Fixes for `vagrant up`

vagrant:
  - check actual IP;
  - only init machine first time, just as native installations;
  - add .bash_profile to permissions fixup;
  - cleanup excessive newlines in making .bash_profile;

README:
  - include admin & debugging use;
  - info about re-initializing VM & manually running create-dev-env.sh;
  - add django admin & debug_toolbar setting info

Conflicts:
	AUTHORS
	scripts/vagrant-provisioning.sh
Merge pull request #450 from edx/jbau/configure-session

Allow session backend to be configurable
Merge pull request #408 from edx/cale/make-release-email-script-wiki-friendly

Make release email script wiki-friendly
Merge pull request #432 from edx/peter-fogg/update-asset-deletion-prompt

Change delete asset prompt to Warning type for consistency.
Studio: adds a space back to the phrase 'Welcome to edX Studio' that went missing
Studio: revises spacing fix for welcome to edX studio title
blankslate edited, header bar now with home button
basic shell for discussion home page with both profile information and email notification settings
addition of font-awesome to LMS sass vendor assets, in additio nto light organization for applicaiton.scss to match studio sass breakdown.
added in vendor font references to lms for font-awesome
cleaned up font-awesome integration to work with new mako file .scss compiling, added in initial icon references
cleaned up variables styling to sync up closer to studio, incorporated fontawesome icons into discusison home with basic positioning
basic shell for home page exists, along with start of color cleanup for the rest of _discussion.scss
removed border to the right of discussion list