Updates pull request from Roman Tsypuk to convert the build system from

ant to gradle.  Removes linux and windows application launch scripts and
produces an executable jar with all resources included.

src/main/java/io/github/dsheirer/controller/channel/ChannelSelectionManager.java

@@ -0,0 +1,69 @@
+/*******************************************************************************
+ *     SDR Trunk 
+ *     Copyright (C) 2015 Dennis Sheirer
+ * 
+ *     This program is free software: you can redistribute it and/or modify
+ *     it under the terms of the GNU General Public License as published by
+ *     the Free Software Foundation, either version 3 of the License, or
+ *     (at your option) any later version.
+ * 
+ *     This program is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *     GNU General Public License for more details.
+ * 
+ *     You should have received a copy of the GNU General Public License
+ *     along with this program.  If not, see <http://www.gnu.org/licenses/>
+ ******************************************************************************/
+package io.github.dsheirer.controller.channel;
+
+public class ChannelSelectionManager implements ChannelEventListener
+{
+	private IChannelEventBroadcaster mChannelEventBroadcaster;
+	private Channel mSelectedChannel = null;
+
+	/**
+	 * Manages channel selection state to ensure that only one channel is ever
+	 * in a selected state.
+	 */
+	public ChannelSelectionManager( IChannelEventBroadcaster broadcaster )
+	{
+		mChannelEventBroadcaster = broadcaster;
+	}
+
+	@Override
+	public void channelChanged( ChannelEvent event )
+	{
+		switch( event.getEvent() )
+		{
+			case REQUEST_SELECT:
+				if( mSelectedChannel != null )
+				{
+					mSelectedChannel.setSelected( false );
+					mChannelEventBroadcaster.broadcast( new ChannelEvent( mSelectedChannel, 
+							   ChannelEvent.Event.NOTIFICATION_SELECTION_CHANGE ) );
+					mSelectedChannel = null;
+				}
+				
+				mSelectedChannel = event.getChannel();
+				mSelectedChannel.setSelected( true );
+				mChannelEventBroadcaster.broadcast( new ChannelEvent( event.getChannel(), 
+						   ChannelEvent.Event.NOTIFICATION_SELECTION_CHANGE ) );
+				break;
+			case NOTIFICATION_PROCESSING_STOP:
+			case REQUEST_DESELECT:
+				if( mSelectedChannel != null && 
+					mSelectedChannel == event.getChannel() )
+				{
+					mSelectedChannel.setSelected( false );
+					mSelectedChannel = null;
+					mChannelEventBroadcaster.broadcast( new ChannelEvent( event.getChannel(), 
+							   ChannelEvent.Event.NOTIFICATION_SELECTION_CHANGE ) );
+				}
+				break;
+			default:
+				break;
+		}
+	}
+
+}