My first version of the collision "world"/"system"
- Setup framework. Objects in the collision system have a model for
collision and one for rendering. Normally this is the same, but to
enable collisions with Dawn's sun (while still having her code draw it)
that particular object has no "view" model.
- Models loaded from .obj files, currently using the sculpt_sphere only
but potential to move over sculpted models from Stephen's bit
- Very rudimentary gravity, if you run it you *might* get some meteors
attempting to orbit the sun, everything is random for now
- Baby's first collision detection (based on sphere radii). Doesn't
actually *do* anything with detected collisions yet
- Cleaned up main.cpp a little, just removing the loading of all the
unnecessary obj files but more could be done here
Tidyup makefile for various systems, still Windows by default though
Merge branch 'master' of https://github.com/dawner/ReSpaced
Fix dumb local merge; makefile tweaks