fix comment popup and hover
touch up user activity and sidebar_comments.jst.ejs
i think i fixed a comment bug?
include track attrs in playset json
add jquery ui
add set form popup and style playset
move explore page js to explore.js and ignore coffeescript
rm coffee and mv js
finish remove coffee
partition volume js into separate file
add multi tracks to sets (possible bug due to audio tags on play_set.jst.ejs lines 12 thru 18)