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/objects/Circle.java

@@ -56,7 +56,7 @@ public class Circle implements HitObject {
 	 */
 	public static void init(GameContainer container, float circleSize) {
 		int diameter = (int) (96 - (circleSize * 8));
-		diameter = diameter * container.getWidth() / 640;  // convert from Osupixels (640x480)
+		diameter = (int) (diameter * OsuHitObject.getXMultiplier());  // convert from Osupixels (640x480)
 		GameImage.HITCIRCLE.setImage(GameImage.HITCIRCLE.getImage().getScaledCopy(diameter, diameter));
 		GameImage.HITCIRCLE_OVERLAY.setImage(GameImage.HITCIRCLE_OVERLAY.getImage().getScaledCopy(diameter, diameter));
 		GameImage.APPROACHCIRCLE.setImage(GameImage.APPROACHCIRCLE.getImage().getScaledCopy(diameter, diameter));