Client/map: Implement a map designer that can work while you are in game

[assofohdz]

Situation: Currently the map cannot be edited from within the game. The LVL/LVZ editors in the current Subspace sphere is needed

Ask: Implement functions on the client side that interacts with the MapSystem on the server to create/update/delete tiles in the game. A Lemur panel can be used to create functions to let the player choose which tile to create etc.