Addded Invisiaxe, prototype invisitool
Merge pull request #6 from Rekkyn/master

Invisible invisiblocks!
Added the rest of the invisitools, though there is a crash on startup.

Investigating...
Fixed crashy bug.
Added invisiPlates
+Added packet handlers for SMP support (In theory)

- Re-organized classes into more specific classes for cleanliness.
Updated to 1.5.2