Moved things to the correct packages.
Fixed some errors in the code (e.g. player.getName() in HorseListener)
JarUtil initialises (and adds) Gadgets that are in the "gadgets"
package..

And gadget event listeners MUST end with "Listener.java"
Gadgets can now be implemented just by creating them (Must be inside the
gadgets package)
Removed the use of "JavaUtil" (Was just for demonstraive purposes)
Merge pull request #6 from TGRHavoc/master

Package cleanup and other.