Bugfixes and markdown contributions
added commenter name and time to comments
fix autosizing of paragraphs when creating new ones
scenes properly resize when scenes are created and when alternatives are toggled
delete comments when scenes are cleared
change site name to ensemble from storycollab
change 'suggestions' to 'alternatives'
move coffee-rails outside assets group in Gemfile
Merge branch 'master' of https://github.com/StanfordHCI/story-collab
Merge branch 'master' into release
moved uglifier outside of assets group
Merge branch 'contributions'
Merge branch 'master' into release