* Instead of doing constant G_MapNumbers when finding the relationship between maps and cups...
* Add a cache of level IDs to cups, to go with the strings.
* Add a cache of the cup pointer to maps, so we don't have to search through all cups to find our map. (done in P_InitMapData)
* Pre-emptive work: G_IsSpecialStage and P_GetNextEmerald now reference cup data instead of a hardcoded ID set.
* Remove a bunch of old stuff from mapheaderinfo_t/associated, and reorder what stays
* Countdowntimer? 💥
* Startrings? 💥
* sstimer/ssspheres? 💥
* forcecharacter? 💥 (distinct from forceskin)
* interscreen? 💥
* sstage_start/end and smpstage_start/end? 💥💥💥💥
* You've been blocked
* G_MapNumber now returns a special NEXTMAP_INVALID if not found, for more consistent reference.
* Incorporate a good chunk of the `edit-headers` branch. Can't clear maps individually because of the new restrictions on sequential mapheaders, but we can add a "disable in vote screen, not even for map hell/archive" flag to a map at some future juncture for equivalent functionality...
- mapvisited and recorddata_t (previously mainrecords)
- Changed how gamedata is saved and loaded
- Change the versioncheck (funny hex provided by chengi) AND call it `developringdata.dat` in develop builds
- Fix a bunch of off-by-ones in condition and emblem data
ALSO, for Time Attack:
- Fix menu not showing off your times
- Now save times even when gamedata modified, since the menu didn't care (come back to it?)
- Don't save times or do intermission screen if the Capsule Attack ended because you lost all your bumpers
- Fix a crash adding ghosts in Capsule Attack
- Explosion strength scales with how long you've been outrunning it. 0 seconds is even more punishing than it was before, while surviving 60+ seconds converts the damage into minimal stumble.
- When it starts properly chasing a new target, it will be intangible for 1 second
- Hot potato takes 2 seconds instead of 7
- Too much hot potato will make it run ahead & explode (untested)
