Makefile.am: Move surface-light.{cc,h} into libsnoglight.a
Makefile.am: Move bsdf.h into libmaterial.a
Makefile.am: Move surface-sampler.{cc,h} into libsnogscene.a
Makefile.am: Move surface{,-sampler}.{cc,h} into libsnogsurf.a
Makefile.am: Move material.{cc,h} into libsnogmat.a
Makefile.am: Move primitive.{cc,h} into libsnogsurf.a
Move intersection stuff into a new library "libsnogisec.a"
Makefile.am: Move media.{cc,h} and medium.h into libsnogmat.a
Makefile.am: Move dist.h into libsnogmat.a
Makefile.am: Move geometry sampling files into libsnoggeom.a
Makefile.am: Move histogram sampling files into libsnoggeom.a
Makefile.am: Move tex.h and tex-coords.h into libsnogtex.a
Makefile.am: Move triv-space.h into libsnogspace.a
Makefile.am: Rearrange library link-order a bit
Makefile.am: Move surface-group.{cc,h} into libsnogsurf.a
Makefile.am: Move material-dict.{cc,h} into libsnogmat.a
Move photon-mapping into a new library "libsnogphoton.a"