Boundary data

[JanVogelsang]

Add obstructions and boundary data

[JanVogelsang]

• [x] Export obstructions using fdsreader
• [x] Export boundary data using fdsreader
• [x] Add a data structure that corresponds to obstructions in the engine
• [x] Add a data structure that can handle boundary data
• [x] Spawn obstructions automatically in the world
• [x] Create dynamic materials for the spawned meshes with correct UV-mapping for the 6 faces of the mesh. Therefore somehow combine all 6 textures into a single one for each timestep