Read processors in reverse order.

- EditSessionBuilder always assigns the history processors before the limit extents, meaning the limit did not get properly flushed to history, but because spigot is notified of the changes after the processes have taken place, the correct edit was displayed to the player and placed into the world.
 - This might break other stuff...

worldedit-core/src/main/java/com/boydti/fawe/beta/implementation/processors/MultiBatchProcessor.java

@@ -56,7 +56,8 @@ public class MultiBatchProcessor implements IBatchProcessor {
     @Override
     public IChunkSet processSet(IChunk chunk, IChunkGet get, IChunkSet set) {
         try {
-            for (IBatchProcessor processor : this.processors) {
+            for (int i = processors.length - 1 ; i >= 0; i--) {
+                IBatchProcessor processor = processors[i];
                 set = processor.processSet(chunk, get, set);
                 if (set == null) {
                     return null;