Blocks - Version 1.0

WARNING: SCENES WILL NEED TO BE CREATED AGAIN.

Blocks:
- replaced the old prefabs with new block prefabs associated with the
new types
- made material swapping for each block
- removed the old block script and replaced it with a blockclass
abstract class
- added in alpha material for the blocks used for multi blocks
- added 4 new classes for the new block types to extend from the
blockclass abstract class
-

Game:
- fixed up the undo movement throwing a null return
- re-implementation of creation of blocks now, instead of selecting a
block type in the inspector you press a button in the inspector to open
up a window.