Modify maps a bit

TODO.txt

@@ -1,5 +1,9 @@
 =========== GENERAL ==============
 
+- Try doing the bouncy car body? Just keep a point and its velocity, change
+  its velocity by a proportion of car's velocity change (this minus prev.
+  frame), then offset car body by this. However we'll also have to transform
+  inbetween world space and model space.
 - Consider better input handling in SDL? Currently it just detects presses on
   the exact frame, so a press can be missed. But how tho?
 - Try to mess with car weight?
@@ -53,7 +57,7 @@
 - replay validation
 - make the racing module usable by itself, e.g. to allow making tools for
   verifying replays etc., i.e. make the module measure time, count checkpoints
-  etc.
+  etc. DONE?
 - allow slowing down in air like in TM?
   lower memory)
 - at the end check error handling, make sure the game handles garbage data in