- start setup akka system for bbb-apps

...a/org/bigbluebutton/core/bus/IncomingJsonMessageBus.scala

bbb-apps-common/.gitignore

bbb-apps-common/build.sbt

...n/src/main/java/org/bigbluebutton/client/IClientInGW.java

.../scala/org/bigbluebutton/client/ClientGWApplication.scala

.../src/main/scala/org/bigbluebutton/client/ClientInGW.scala

...ain/scala/org/bigbluebutton/client/IncomingEventBus.scala

...n/scala/org/bigbluebutton/client/IncomingJsonMsgBus.scala

...n/scala/org/bigbluebutton/client/MessageSenderActor.scala

...a/org/bigbluebutton/client/ReceivedJsonMsgHdlrActor.scala

.../scala/org/bigbluebutton/client/SystemConfiguration.scala

...tton/client/endpoint/redis/AppsRedisSubscriberActor.scala

...utton/client/endpoint/redis/KeepAliveRedisPublisher.scala

...g/bigbluebutton/client/endpoint/redis/MessageSender.scala

.../bigbluebutton/client/endpoint/redis/RedisPublisher.scala