Initial replay parsing support.

- Basic implementation of viewing replays in the Game state.
- Added OsuReader class for reading certain osu! file types. (author: Markus Jarderot)
- Added Replay, ReplayFrame, and LifeFrame classes to capture replay data. (author: smoogipooo)
- Added 'keyPressed' parameter to HitObject.update().
- Added cursor-drawing methods in UI that take the mouse coordinates and pressed state as parameters.
- Added GameMod methods to retrieve/load the active mods state as a bitmask.
- Added Apache commons-compress dependency for handling LZMA decompression.

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

src/itdelatrisu/opsu/OsuHitObject.java

@@ -129,6 +129,16 @@ public class OsuHitObject {
 	 */
 	public static float getYMultiplier() { return yMultiplier; }
 
+	/**
+	 * Returns the X offset for coordinates.
+	 */
+	public static int getXOffset() { return xOffset; }
+
+	/**
+	 * Returns the Y offset for coordinates.
+	 */
+	public static int getYOffset() { return yOffset; }
+
 	/**
 	 * Constructor.
 	 * @param line the line to be parsed