more debug attempts at sky rendering..
celestial bodies renderer fixed now, now onto sky..
night and sun works together now

stupid me, forgot 0 is NOT the default framebuffer i want to draw to
here. that's qt's. 9 is mine (well, it's runtime, so Game::GLFbo).
and of course, i switched it in all the other main renderers..not sky,
which was disabled
yay! works finally :)

was setting positions/texcoords wrong