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/module/Module.java

@@ -0,0 +1,76 @@
+/*******************************************************************************
+ *     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.module;
+
+import java.util.concurrent.ScheduledExecutorService;
+
+public abstract class Module
+{
+	/**
+	 * Defines the basic component level class for all processing, demodulation
+	 * and decoding components that can operate within a processing chain.
+	 * 
+	 * Modules can optionally implement any of the following interfaces:
+	 * 
+	 * IAudioPacketListener				consumes audio packets
+	 * IAudioPacketProvider				produces audio packets
+	 * ICallEventListener				consumes call events
+	 * ICallEventProvider				provides call events
+	 * IChannelEventListener			consumes channel events
+	 * IChannelEventProvider			provides channel events (reset, selection, start, etc)
+	 * IComplexBufferListener			consumes complex samples and normally 
+	 * 									produces demodulated real sample buffers
+	 * IFrequencyCorrectionController	provides tuned frequency error corrections
+	 * IMessageProvider					produces messages
+	 * IRealBufferListener				consumes demodulated real sample buffers
+	 * IRealBufferListener				produces demodulated real sample buffers
+	 * ISquelchStateListener			consumes squelch states
+	 * ISquelchStateProvider			provides squelch states
+	 */
+	public Module()
+	{
+	}
+
+	/**
+	 * Initialize or reset all internal states to default - prepare to start
+	 * processing or resume processing, potentially with a different source.
+	 * 
+	 * This method is invoked after constructing a module, and following any stop()
+	 * calls and before any start() calls.  This allows the module to prior to
+	 * starting a module and starting it again processing a newly tuned channel,
+	 * like a traffic channel.
+	 */
+	public abstract void reset();
+
+	/**
+	 * Start processing.  Provides an executor to use for scheduling tasks
+	 */
+	public abstract void start( ScheduledExecutorService executor );
+
+	/**
+	 * Stop processing
+	 */
+	public abstract void stop();
+	
+	/**
+	 * Dispose of all resources and listeners and prepare for garbage collection
+	 */
+	public abstract void dispose();
+	
+}