Merge pull request #1 from jsilvestre/master

Changed: view order is synchronized with model order
fix sort
add : sorting
add : red glyphicons
add : multiple upload
add : drag'n'drop for file upload, improved : uploader style
add : special message when the trackCollection is empty, add : upload can now be canceled if not started
package.json filled + add : dataSystem partial content request
add range in header requests
trying to settle this f****** bar
trying to settle this f****** bar
add : nicescroll scrollbar
improve : scroll top on upload
finished scroll experimentation
add : auto-fill with blank track if there is not enough tracks to fill the screen
add : some responsiveness
Merge pull request #2 from poupotte/master

Add range in header requests
add : connecting flash
add : visual indicator for the soundmanager loading
add : display info on track add play