Minor optimizations.

- Only retrieve song information String[] when needed.
- Don't try to load glyphs if Unicode metadata is disabled.

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

src/itdelatrisu/opsu/GameImage.java

@@ -324,7 +324,7 @@ public enum GameImage {
 	}
 
 	/**
-	 * Game image constructor.
+	 * Constructor.
 	 * @param filename the image file name
 	 */
 	GameImage(String filename) {
@@ -333,7 +333,7 @@ public enum GameImage {
 	}
 
 	/**
-	 * Game image constructor.
+	 * Constructor.
 	 * @param filename the image file name
 	 * @param gameImage whether or not the image is related to gameplay
 	 */