function is_video_valid returns true if video is valid

- Created function "seySync( )" which sets the sync logic. Basically, we sync all medias when pausing the master video. We pause the master video when any video receives a waiting event, or when the master video is seeked. If necessary, we resume playing after the sync.

- Refactored when 'media-ready' event is fired.  We fire this event only when the medias receive a 'canplayall' event.

- Popcorn "onFrame" method runs around 6 times per second. That was unnecessary , causing the CPU work to significantly increase, and preventing the two videos (deskshare and webcam) to run together smoothly

- We only synchronize the medias if one of them fires a "waiting" event. If the user pauses the playback, we synchronize them as well.

Refactored shapes drawing

fix issue introduced by last commit, in which the full path of the deskshare video file was not provided in order to check if it was a valid video or not

Fix playback text

Fixed wrong font sizes and placement in playback so now they match the annotated text from the presentation

Fix start/stop webcam events for the intermediary video formats

recording: Run the 'ser' fixup tool on deskshare videos, too

Saving processed audio and using it to process webcam videos

Since the deskshare videos are saved in flv files by red5, they can
have the same partially written file issue as seen on webcams.

Webcam videos processing was processing the audio again.

Playback fixes

Mconf fullscreen video

Conflicts:
	bigbluebutton-client/src/org/bigbluebutton/modules/videoconf/views/UserGraphicHolder.mxml

Avoid keeping unwanted annotations when seeking over the playback. This fixes a major bug but loses some of the smoothness that I could't avoid

Reconnection timeout 1.0

Conflicts:
	bigbluebutton-apps/src/main/scala/org/bigbluebutton/core/MeetingActor.scala
	bigbluebutton-apps/src/main/scala/org/bigbluebutton/core/api/InMessages.scala
	bigbluebutton-apps/src/main/scala/org/bigbluebutton/core/api/ValueObjects.scala
	bigbluebutton-apps/src/main/scala/org/bigbluebutton/core/apps/users/UsersApp.scala
	bigbluebutton-apps/src/main/scala/org/bigbluebutton/core/apps/users/UsersModel.scala
	bigbluebutton-apps/src/main/scala/org/bigbluebutton/freeswitch/FreeswitchConference.scala
	bigbluebutton-apps/src/main/scala/org/bigbluebutton/freeswitch/FreeswitchConferenceActor.scala
	bigbluebutton-client/src/org/bigbluebutton/main/api/ExternalApiCallbacks.as
	bigbluebutton-client/src/org/bigbluebutton/main/api/ExternalApiCalls.as
	bigbluebutton-client/src/org/bigbluebutton/modules/phone/managers/ConnectionManager.as
	bigbluebutton-client/src/org/bigbluebutton/modules/phone/managers/FlashCallManager.as
	bigbluebutton-client/src/org/bigbluebutton/modules/users/services/MessageReceiver.as

The playback had no handling for this type of event. The aspect ratio used to calculate the max-width of the slide div has to be the vbox aspect ratio.

Conflicts:
	bigbluebutton-client/src/org/bigbluebutton/modules/videoconf/maps/VideoEventMap.mxml
	bigbluebutton-client/src/org/bigbluebutton/modules/videoconf/maps/VideoEventMapDelegate.as
	bigbluebutton-client/src/org/bigbluebutton/modules/videoconf/views/GraphicsWrapper.as
	bigbluebutton-client/src/org/bigbluebutton/modules/videoconf/views/UserGraphicHolder.mxml

Fixed NPE thrown when presenter leaves room and whiteboard toolbar ha…