cya for now turbolinks

breaking too much stuff currently. we’ll go through later and fine-tune
it so it works better
Get rid of sqlite3 in prod
Merge branch 'master' into videolectures
Remove sqlite from production
Merge branch 'videolectures'
Add pg for heroku
Add rudimentary persistence to sidebar
Icon adjustments, animation disabling
Fix lecture/video switching
Remove discussion icon
Merge branch 'persistence'

Conflicts:
	app/assets/javascripts/application.js
Merge branch 'master' into webwork_integration