Add physics version

TODO.txt

@@ -3,10 +3,6 @@
 - car deglitch idea: deglitch only if the middle joint collided this frame?
 - some kinda easteregg in menu or smt
 - make the U-ramp map taller due to new physics
-- replay format should probably record game version
-  - also there should probably be some version system that says version of
-    physics vs version of everything else; replay could only record physics
-    version (maybe just two or three chars?)
 - on 1st map the camera is obscured by the wall at the start, fix it somehow
   (not the best first impression)
 - culling is very slow now, it showed that distance bailout can accelerate it
@@ -62,12 +58,18 @@
 
 =========== BUGS =================
 
+- sometimes getting a SLIGHTLY slower time counts as beating it (prolly
+  conversion fail)
 - immediately after starting the map countdown seems to be lower
 - the pinch collision test seems to sometimes stop the car e.g. after falling
   from bigger height or when running into ramp at high speed (or not?) - FIX
 
 =========== HANDLED ==============
 
+- replay format should probably record game version
+  - also there should probably be some version system that says version of
+    physics vs version of everything else; replay could only record physics
+    version (maybe just two or three chars?)
 - player name (modifiable via resource file) <-- prolly not
 - address the bug with driving on curved ramp diagonally, try DECREASING number
   of reshapes