Release notes 12-16-14

@srpearce @fredsmith  @explorerleslie 

need to complete by 11:00

FYI @lamagnifica @catong 
Just checked on Studio: the sidebar on the Files & Uploads page says *recommended* limit is 10MB so I think that is OK -- the (configured) hard limit will be indicated by the message when a user exceeds the hard limit. @explorerleslie @mhoeber do you agree?