Edited Server class:
 - moved code for accepting one client out of thread into separate method(acceptClient());
 - clientListeningThread is started in the start() method;

StreamCommunicator:
 - added sendMessageToMany method.
Server:
 - changed list type from OutputStream to Socket
 - added javadoc comments to methods

ClientMessaging:
 - edited sendMessageToMany method to use a list of Sockets