Merge branch 'master' into implement-multi-chat

.../presentationpod/CreateNewPresentationPodPubMsgHdlr.scala

...tton/core/apps/presentationpod/PresentationPodHdlrs.scala

...utton/core/apps/presentationpod/PresentationPodsApp.scala

.../core/apps/presentationpod/SetCurrentPagePubMsgHdlr.scala

...re/apps/presentationpod/SetPresenterInPodReqMsgHdlr.scala

...cala/org/bigbluebutton/core/models/PresentationPods.scala

...ton/core/pubsub/senders/ReceivedJsonMsgHandlerActor.scala

...n/scala/org/bigbluebutton/core/running/MeetingActor.scala

...scala/org/bigbluebutton/common2/domain/Presentation.scala

...org/bigbluebutton/common2/msgs/PresentationPodsMsgs.scala

...rg/bigbluebutton/modules/present/business/PresentProxy.as

.../modules/present/events/RequestNewPresentationPodEvent.as

...utton/modules/present/events/SetPresenterInPodReqEvent.as

...tton/modules/present/events/SetPresenterInPodRespEvent.as

...g/bigbluebutton/modules/present/maps/PresentEventMap.mxml

...ton/modules/present/services/messaging/MessageReceiver.as

...utton/modules/present/services/messaging/MessageSender.as

...uebutton/modules/present/ui/views/PresentationWindow.mxml

...org/bigbluebutton/modules/present/ui/views/SlideView.mxml

...rs/org/bigbluebutton/web/controllers/ApiController.groovy