Updated dependencies.

- LWJGL is now at the final 2.x release version.
- Slick2D is now at the final (?) release version.
- Added dependency for org.tukaani.xz, since it becomes optional in commons-compress 1.9 and is needed for LZMA compression.

Signed-off-by: Jeffrey Han <itdelatrisu@gmail.com>

src/org/newdawn/slick/Image.java

@@ -595,6 +595,7 @@ public class Image implements Renderable {
 	 * @param y The y location to draw the image at
 	 * @param filter The color to filter with when drawing
 	 */
+	@Override
 	public void draw(float x, float y, Color filter) {
 		init();
 		draw(x,y,width,height, filter);
@@ -719,6 +720,7 @@ public class Image implements Renderable {
 	 * @param height
 	 *            The height to render the image at
 	 */
+	@Override
 	public void draw(float x,float y,float width,float height) {
 		init();
 		draw(x,y,width,height,Color.white);
@@ -797,6 +799,7 @@ public class Image implements Renderable {
 	 * @param height The height to render the image at
 	 * @param filter The color to filter with while drawing
 	 */
+	@Override
     public void draw(float x,float y,float width,float height,Color filter) { 
     	if (alpha != 1) {
     		if (filter == null) {