CONTRIBUTING.md: update with reference to test data doc.
Merge pull request #1997 from soniakeys/x-common-test-data

CONTRIBUTING.md: update with reference to test data doc.
Update xapi seed data
Turn off i18n localization
add a beta ribbon on bottom right
Merge pull request #2002 from jalyna/jalyna/add-beta-banner

Add a beta ribbon on bottom right
Do not warn about duplicate on empty first attempt
Update ruby to 2.1.2
Fix progress-bar numbers being a bit off to the left
Merge pull request #2009 from dmitriy-korotayev/master

Fix progress-bar numbers being a bit off to the left
Bump ruby version in travis config
Add markdown preview to nit edit.
Merge pull request #2012 from apothem/master

Add markdown preview to nit edit.
Add escaping for strings in editing comment. Fixes #2014
Setup compass with bootstrap sass
Remove not needed configuration

(everything is in config.rb)
Integrate frontend css to sass stack
Migrate site to bootstrap 3
Update README to explain scss setup
Commit CSS -- hacky workaround

This is just until I can figure out how to get the precompile stuff working on heroku