* Fix off-by-one error I caused in the skin randomisation selection.
* Clean up signcolour set to never go outside of valid entry range.
* Fix the preventing-console-spam mechanism for invalid sprites viewed in-game by only setting the state's sprite/frame to S_UNKNOWN's if the object's sprite/frame is currenly equal to the state's.
* Expose this via additional upper-16-bits flags of A_FlickySpawn.
* Use this to make Snailers not spawn their flicky inside the wall they're attached to.
* Make the behaviour of Egg Capsules more consistent mechanically regarding the flicky spawning, using the above as one relevant element.
* Add "twinkling" and "landing sounds to paper signpost.
* Fix whitespace on definitions.
* It says locvar2 is unused in the comment for A_SignSpin, but it's used for the "doesn't have a spawnpoint" thing. Make it deathstate instead, so the object doesn't disappear.
* When activated, stops the timer in SP/MP.
* Applies to the mapheader countdowntimer as well.
* If you're playing Record Attack, also exits the level immediately.
* It has no special modes, no linedef flags, no parameters, nothing.
* Only not an innate property of A_BossDeath because people may want it to NOT happen sometimes, or make it happen with non-boss events too.
Also, skip over calling P_DoPlayerExit if the player isn't in game.
* Tweaked to use new sprites.
* Jet fume behaves much closer to Lach's wonderful work.
* Instead of clobbering tracer to spawn powerup overlay, use hprev.
* Change timings. One second less to charge up, but two seconds less to spin them out.
* Remove terrible pinch overlay in favour of new dashmode-mimic flashing.
This commit also fixes MF_NOCLIP not working properly on players. Sink now spawns an SPB explosion on successful hit, since dying is no longer a harsh punishment.
- Player direction value uses momentum angle rather than facing angle (fixes weird nextwaypoint/position flickering while drifting)
- Raise default radius to 384
