Terrain Editing Complete

With the terrain editing feature I have finished my work. You can now add/remove, move, resize the height nodes all in real-time (albeit. with a frame rate drop) which makes viewing the final feel of the game much easier. The next thing to add is live resource updating so that when you tab back into the game window, it will automatically reload some of the easier resources like textures.

(Thanks Overgrowth for the idea)