Trying to make up for some of the startup speed lost in the SDL
transition. This saves about 1s from start (from ~3s), and about 500 MB
of RAM.
- Faster TIE unpack by merging matrix groups, more efficient vertex
transforms, and skipping normal transforms on groups with no normals.
- Refactor generic merc and merc to use a single renderer with multiple
interfaces, rather than many renderers. Removed "LightningRenderer" as a
special thing, but Warp is still special
- Add more profiling stuff to startup and the loader.
- Remove `SDL_INIT_HAPTIC` - this turned out to be needed for
force-feedback steering wheels, and not needed for controller vibration
- Switched `vag-player` to use quicksort instead of the default GOAL
sort (very slow)
