fixing bug #5885
IM sent messages are no more saved
fixing bug #5784
exposing regular files AND form items (files, images and videos)
fixing bug #5911
storing HttpSession instead of MainSessionController...
Some corrections :
- fixing bad behavior of user authentication verifiers when the user is anonymous
- fixing the security token renew process which was not performed at right time
Merge branch 'ney-bugs-20141014' into core-5.14.x