only copies the slides text files if they exist; this is to keep the script compatible with old recordings

reverted the code used to process the video for the matterhorn integration; many fixes on the video processing for the new playback format "presentation"; now it's possible to set the output video resolution for the presentation playback - it's VGA by default but could be set to HD

Conflicts:
	bigbluebutton-client/resources/prod/bbb-deskshare-applet-0.8.jar
	deskshare/applet/src/main/java/org/bigbluebutton/deskshare/client/net/NetworkHttpStreamSender.java

 - add presentation control key binding

Conflicts:
	bigbluebutton-client/src/org/bigbluebutton/modules/present/ui/views/PresentationWindow.mxml

 - handle where presenter creates a new text annotation without commiting the previous text annotation