* added FreeBSD support (10.0 only)
 * added preliminary freeocl and pocl support (freeocl is pretty much defunct, but I'm still testing pocl)
 * updated README with x11 forwarding notes (export LIBGL_ALWAYS_INDIRECT=yes && export SDL_VIDEO_X11_NODIRECTCOLOR=yes)
 * removed ARB_texture_multisample functions pointers (these aren't used and won't be needed in the future)
 * cityhash FreeBSD compat
 * premake.sh sh compat
 * don't link libc++abi on FreeBSD
 * for pocl support: run ./premake.sh --pocl