Add time to replays

TODO.txt

@@ -1,12 +1,13 @@
 =========== GENERAL ==============
 
+- replay validation
 - add time slow down setting
 - the horizon on background seems too low? maybe add setting to shift it a bit?
 - add argc/argv to gameInit? could be used to quickly start maps, verify
   replays etc.
 - maybe each map could have a target time embedded: when beaten, the map would
   be marked as such
-- player name (modifyable via resource file)
+- player name (modifiable via resource file)
 - popup messages? would be useful for several things: showing checkpoint times,
   showing changes in menu etc.
 - make the racing module usable by itself, e.g. to allow making tools for
@@ -17,7 +18,6 @@
   lower memory)
 - at the end check error handling, make sure the game handles garbage data in
   resource file etc.
-- replay format
 
 =========== BUGS =================
 
@@ -27,6 +27,7 @@
 =========== HANDLED ==============
 
 - allow stopping car rotation in air like in Trackmania
+- replay format
 - prevent time overflow! stop incrementing level frame once it's at maximum
 - car shadow? probably would have to be done as screen space effect with
   z-buffer (shadow as 3D model would require collision detection and would make