Fixed TNT explode listener, and added EnhancedRunnable class.
Class EnhancedRunnable' is basically just an Runnable, but it adds
an options to easily start and stop current Bukkit (!) task - so you don't have to create variables, maps or lists containing tasks ID.
Merge pull request #113 from shooly/master

Fixed TNT explode listener, and added EnhancedRunnable class.