Makes 'select all' checkbox select only inputs with class 'selector'
Adds support for UGC.subject field

Also, expects UGC.textContent be a string now
Added a flag to publicUGC "watched" true when user has a subscription to that UGC targetId,false if use don't watch that ugc or is not authenticated
Merge remote-tracking branch 'david/master'
Merge branch 'master' of github.com:craftercms/social