Shadow Rays

Added a visibility function that works between any 2 points in space (inside or outside the octree).
This means that I can finally implement shadow rays. [Maybe even radiosity :) but that is for another day]

But for the time being, here are the results of shadowing:


Single Light source


2 Light sources

Shadow rays can be computationally heavy as I found out:


Not much time to spend today, so thats all for now.