Rework CPs

TODO.txt

@@ -1,5 +1,18 @@
 =========== GENERAL ==============
 
+- asset system:
+  - assets are to be loaded from one BIG string consisting of substrings, each
+    substring adds a map, replay, setting etc.
+  - part of the substring will be hardcoded (default maps)
+  - optionally a frontend can extend this from a file
+- 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.
+- racing update step should return events that happened, e.g.:
+  - CP taken
+  - crash (to play sound)
+  - finish
+  - etc.
 - car shadow?
 - sound engine: probably all SFX will be procedurally generated, ok?
 - allow slowing down in air like in TM?