soft shadows appear to be working
minor changes to parser
Hacky soft shadows work!
added bounding box objects

Not thoroughly tested. Possible floating pt problems etc.
minor bug fix in Octrees
Fixed refraction, reflections, colored shadows. Broke soft shadows.
Bounding box objects work but...

Bounding box objects work, but because of floating point imprecision
they are not great.
Updated preview scene
More updates to preview scene
Resolved merge conflicts.
Added many GUI elements, simplified Octree traversal
merged with Aaron