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/GameImage.java

@@ -18,6 +18,8 @@
 
 package itdelatrisu.opsu;
 
+import itdelatrisu.opsu.states.SongMenu;
+
 import java.io.File;
 import java.util.ArrayList;
 import java.util.List;
@@ -381,7 +383,7 @@ public enum GameImage {
 	MENU_BUTTON_BG ("menu-button-background", "png", false, false) {
 		@Override
 		protected Image process_sub(Image img, int w, int h) {
-			return img.getScaledCopy(w / 2, h / 6);
+			return img.getScaledCopy(w / 2, h / SongMenu.MAX_SONG_BUTTONS);
 		}
 	},
 	MENU_TAB ("selection-tab", "png", false, false) {