Pulling all pending Bukkit-JavaDoc changes

A special thanks goes to @aerouk for almost all of the changes found here.

src/main/java/org/bukkit/event/block/BlockExpEvent.java

@@ -26,7 +26,8 @@ public class BlockExpEvent extends BlockEvent {
     }
 
     /**
-     * Set the amount of experience dropped by the block after the event has processed
+     * Set the amount of experience dropped by the block after the event has
+     * processed
      *
      * @param exp 1 or higher to drop experience, else nothing will drop
      */