Integrate render subsystem into Editor

[gorlak]

Major work in progress. Too much to state here.

[gorlak]

Lets try and flesh this out a bit. I see a couple of major things here:
1 - update old d3d9 draw code in the manipulators to draw using the engine (things like the cones, cubes, and lines)
2 - get the graphics engine and asset system initialized and drawing frames in OnIdle()... or some sort of game loop that place nice with wxWidgets message handling. Once we have this then we need to figure out how to "load" a project into the engine... and choose which scene to draw in the viewport.
3 - get the persp and ortho camera handling code in SceneGraph and Editor properly configuring the engine viewports

Any idea where we stand on these, @antiuniverse? What changes are in progress in some other branch?