WIP: Build Mode

[Zintixx]

This is very WIP but gets the basic infrastructure of building down.
Parsing UGCMap for all buyable land in the game
Parsing FurnishingShop for all buyable items when building
Adjusted parsing for Map to include saleable cubes.
EDIT: Added beginning stages of the Home button functionality

With the home button currently not working, the only build-able land right now would be land you can purchase in the world.

The biggest things that need to happen is:

• Create a FurnishingInventory. This inventory is all the blocks that you have placed in the world (interior and exterior of your home).
• Create a WarehouseInventory. This inventory is where all your blocks are stored that are NOT placed anywhere.
• We need to have all blocks be redirected to the WarehouseInventory rather than in the standard player's inventory
• Some kind of system to have a specific map ID load all applicable cubes and status of purchased land.
  Housing #73

[AngeloTadeucci]

So what Cube really means in the source and in this handler? Because i'm confusing it between blocks and the house. Maybe we should rename the handler/packet to something else

[Zintixx]

It does seem to be a mishmash of different content. I'm not really sure what better name there could be for an opcode that handles both player housing plots and interacting with the world models.