Inspecting objects

I have wired up the inspector panels for the objects, meaning I can now edit their dimensions precisely, tint them, pick textures and whatever other properties are needed! It almost-almost only needs saving and loading now, in fact, that's the next step! Before that, though, I'll need to break up the level loading in the game from two separate files: the static scene composition, and the character scripting, because I think this editor will only be able to create the static scenes.

I've also done away with the green wireframes!