* Start of supporting multiple platform drivers
* Remove dependency of null platform on SDL2
* cmake: support loading SDL2 dynamically
* Move CMake options to project root for SDL2::SDL2 access
* Don't link to OpenGL
* Move common dynamic loading to header
* Add SDL 1.2 platform
* Add SDL1 platform backend
* Remove accidental addition
* Try multiple platform drivers until we find a good one
* Fix sdl1 mouse
* Use my BRender fork FIXME FIXME FIXME REMOVEME REMOVEME REMOVEME
* Build dethrace supporting SDL1 on ci
* use dethrace-labs BRender fork
* correctly render track based on current view and yon factor
* some physics code
* rotate, translate, self centering steering
* Fix ordering of global variables
* ApplyPhysicsToCars
* car is moving somewhat
* fixes stumbling at low revs
* camera swings around properly when switching direction
* fix compile errors