0.3.4

-Replaced Voxelman with Terraman. It creates simpler meshes, and it's a lot faster, as it's a terrain engine (int only uses a heightmap), and not a voxel engine (full 3d grid). (The meshes look almost the same.)
-Cleaned up / simplified the world generator module.
-Added build postfixes.
-Lots of work on the mesh data editor plugin.
-Added templates for the pi4, and an editor build.