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/spectrum/IDFTWidthChangeProcessor.java

@@ -0,0 +1,7 @@
+package io.github.dsheirer.spectrum;
+
+public interface IDFTWidthChangeProcessor
+{
+	public void setDFTSize( DFTSize size );
+	public DFTSize getDFTSize();
+}