rs-client: Cleanup (#1087)

* rs-client: name SpriteBuffer

* rs-client: (re)name spritebuffer methods

* rs-client/deob: Add missed @Export's, make updatemappings fix this next time

* rs-client: run intellij redundant else inspection

* rs-client: invert some script interpreter if's

* deob: checkstyle fixes

* rs-client: SpriteBuffer_loadSprite -> SpriteBuffer_bufferFile

runescape-client/src/main/java/AbstractByteArrayCopier.java

@@ -22,6 +22,7 @@ public abstract class AbstractByteArrayCopier {
 		signature = "([BI)V",
 		garbageValue = "594076777"
 	)
+	@Export("set")
 	public abstract void set(byte[] var1);
 
 	@ObfuscatedName("l")