Merge remote-tracking branch 'upstream/bbb-2x-mconf' into multi-user-2.0-take3

akka-bbb-apps/build.sbt

akka-bbb-apps/scala/Collections.sc

akka-bbb-apps/scala/Test2.sc

akka-bbb-apps/src/main/resources/application.conf

...rc/main/scala/org/bigbluebutton/SystemConfiguration.scala

...main/scala/org/bigbluebutton/core/BigBlueButtonInGW.scala

.../src/main/scala/org/bigbluebutton/core/MeetingModel.scala

...rc/main/scala/org/bigbluebutton/core/api/InMessages.scala

...n/scala/org/bigbluebutton/core/apps/BreakoutRoomApp.scala

...n/scala/org/bigbluebutton/core/apps/ChatAppHandlers.scala

...rc/main/scala/org/bigbluebutton/core/apps/ChatModel.scala

...rc/main/scala/org/bigbluebutton/core/apps/LayoutApp.scala

.../scala/org/bigbluebutton/core/apps/PermisssionCheck.scala

.../src/main/scala/org/bigbluebutton/core/apps/PollApp.scala

...n/scala/org/bigbluebutton/core/apps/PresentationApp.scala

...scala/org/bigbluebutton/core/apps/PresentationModel.scala

...src/main/scala/org/bigbluebutton/core/apps/UsersApp.scala

...main/scala/org/bigbluebutton/core/models/DirectChat.scala

...main/scala/org/bigbluebutton/core/models/PublicChat.scala

...scala/org/bigbluebutton/core/models/RegisteredUsers.scala