Updates and fixes from fluddokt/opsu@76778f8 and fluddokt/opsu@cf321e9.

- Rotate slider ball image along the curve.
- Show download speed and time remaining when hovering over the download info button.
- Maintain aspect ratio of beatmap background image during gameplay.
- Clear beatmap background image cache after reaching OsuFile.MAX_CACHE_SIZE.
- Multiply hit circle size by OsuHitObject.getXMultiplier().
- Scale MENU_BUTTON_BG based on SongMenu.MAX_SONG_BUTTONS.
- Fixed download search TextField retaining focus even after leaving the downloads menu.
- Include Unicode title/artist strings in searches.
- Parse x,y beatmap coordinates as floats (instead of integers), and only read Kiai time if present.
- Added 1600x1200 resolution.

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

src/itdelatrisu/opsu/states/SongMenu.java

@@ -68,7 +68,7 @@ import org.newdawn.slick.state.transition.FadeOutTransition;
  */
 public class SongMenu extends BasicGameState {
 	/** The max number of song buttons to be shown on each screen. */
-	private static final int MAX_SONG_BUTTONS = 6;
+	public static final int MAX_SONG_BUTTONS = 6;
 
 	/** The max number of score buttons to be shown at a time. */
 	public static final int MAX_SCORE_BUTTONS = 7;
@@ -239,7 +239,7 @@ public class SongMenu extends BasicGameState {
 
 		// background
 		if (focusNode != null)
-			focusNode.osuFiles.get(focusNode.osuFileIndex).drawBG(width, height, 1.0f);
+			focusNode.osuFiles.get(focusNode.osuFileIndex).drawBG(width, height, 1.0f, true);
 
 		// header setup
 		float lowerBound = height * 0.15f;