Release notes 12-16-14

@srpearce @fredsmith  @explorerleslie 

need to complete by 11:00

FYI @lamagnifica @catong 
is **now** limited? Not sure this is a new limit, just that the handling of files over the file size limit has changed. I can't load Studio right now for some reason, but is some limit indicated in the sidebar UI text. Does this match?