Merge pull request #24 from Rim-k/master

Fix bug when uploading using google chrome
Issue 11: Messages management as regards both presence
Merge pull request #25 from liesse/master

Issue #11: Messages management as regards both presence
Issue #11: Adding CSS on personal chat frames
Issue #11: Refractoring PersonalChat.html
Issue 11: Messages management as regards both presence
Issue #11: Adding CSS on personal chat frames
Issue #11: Refractoring PersonalChat.html
Merge branch 'rebase' of https://github.com/liesse/Slides-Dynamiques
Issue #17: Add a button to clearly log off all users
Issue #17: Users' log on by pressing enter after identification
Issue #9: Coupling with EAST session (adding video events on session record, broadca sting messages to all clients when playing a session, possibility to replay, pause and stop the session)