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/channel/state/IDecoderStateEventProvider.java

@@ -0,0 +1,9 @@
+package io.github.dsheirer.channel.state;
+
+import io.github.dsheirer.sample.Listener;
+
+public interface IDecoderStateEventProvider
+{
+	public void setDecoderStateListener( Listener<DecoderStateEvent> listener );
+	public void removeDecoderStateListener();
+}