Blender Git Loki

Moving ScreenSpace methods from Rasterizer to KX_Camera (getScreenPos, getScreenVect, getScreenRay)

The modules were moved in order to access the camera internal matrixes. It will make then compatible with multiple viewports in a near future.
So far the problem I found was:
1) KX_Camera doesn't store the canvas viewport
2) RAS_ICanvas methods: GetDisplayArea and GetWindowArea are affected by multiple viewports (and they shouldn't).

Test file is here: http://www.pasteall.org/blend/68