Add wrapped AWT for headless platform

JavaApp/src/main/java/jdpi/awt/image/WritableRaster.java

@@ -0,0 +1,13 @@
+package jdpi.awt.image;
+
+public class WritableRaster {
+	private BufferedImage image;
+	public WritableRaster(BufferedImage image) {
+		this.image = image;
+	}
+	public DataBuffer getDataBuffer() {
+		int[] theBuf = new int[image.getWidth() * image.getHeight()];
+		image.getRGB(0, 0, image.getWidth(), image.getHeight(), theBuf, 0, image.getWidth());
+		return new DataBufferInt(theBuf, theBuf.length);
+	}
+}