Added ws://hostname:apiport/websockets/chat/active/{address}

Unified Transaction.importAsUnconfirmed() and Controller.onNetworkTransactionMessage()
to both call Controller.onNewTransaction().

Modified Controller.onNewTransaction() to only send transaction signature to
other peers, instead of full transaction. Peers can request full transaction if they
don't have it.

Controller.onNewTransaction() also calls ChatNotifier, which in turn
notifies websocket handlers about new CHAT transactions.

Added jetty websocket dependency to pom.xml

pom.xml

@@ -542,6 +542,12 @@
 			<artifactId>jetty-client</artifactId>
 			<version>${jetty.version}</version>
 		</dependency>
+		<!-- Websocket support -->
+		<dependency>
+			<groupId>org.eclipse.jetty.websocket</groupId>
+			<artifactId>javax-websocket-server-impl</artifactId>
+			<version>${jetty.version}</version>
+		</dependency>
 		<!-- Jersey -->
 		<dependency>
 			<groupId>org.glassfish.jersey.core</groupId>