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/Utils.java

@@ -41,6 +41,7 @@ import java.util.Arrays;
 import java.util.Date;
 import java.util.HashSet;
 import java.util.List;
+import java.util.Scanner;
 
 import javax.imageio.ImageIO;
 
@@ -546,4 +547,15 @@ public class Utils {
 			throw e;
 		}
 	}
+
+	/**
+	 * Converts an input stream to a string.
+	 * @param is the input stream
+	 * @author Pavel Repin, earcam (http://stackoverflow.com/a/5445161)
+	 */
+	public static String convertStreamToString(InputStream is) {
+		try (Scanner s = new Scanner(is)) {
+			return s.useDelimiter("\\A").hasNext() ? s.next() : "";
+		}
+	}
 }