Disable collision checking until I can fix it.

Introducing the slab update starting with the addition of Oak Plank Slabs and Smooth Stone Slabs.
(Stone Brick Slabs are supported too!)

You can place these up and down like in Minecraft, but unlike Minecraft you can also mix them!

I have also enabled collision checking, so you can't accidentally place two blocks inside each other anymore.

Disable game HUD when tool is active to prevent overlapping HUD elements.

Four new blocks added:

• Stone Brick Stairs
  
• Stone Brick Slab
  
• Sugar Cane
  
• Bookshelf

Fix a bug that caused the tool to crash when pressing pick block on something that isn't a block.

New features:

• Scalable UI, you can change this in the ingame menu.
  
• MMB to select block on hotbar (or grab if not available)
  
• Ability to grab items when using the tool. No more placing blocks when opening doors!

New blocks:

• Block Of Diamond
  
• Block Of Emerald
  
• Block Of Redstone

Modified blocks:

• Stone Bricks

Fixes:

• Door hinge position now lines up with the block correctly.
  
• Fix block id tags not being assigned correctly.

Fix an issue with number selecting switching to the tool despite being inactive.
And add the block of gold.

Introduce the first version of the creative inventory and the hotbar.
Also add a button for variable block placing speed.

Fix trapdoor alignment.

Remove debug message and add first iteration of the trapdoor.