Merge branch 'charabilities_mk3' into 'master'

Charabilities MK3 - The third and probably not last branch of character stuff

Been too long since I've made a merge request. This isn't quite done, but I'd consider it... done ENOUGH that I want to work on something else, and keeping it seperate from master will just cause everyone hassle.

Abilities:
* CA_BOUNCE. Bounce on basically anything! Break bustable blocks downwards! Don't take damage from below, unless it's death pit damage, in which case eat shit! Averages to double the jumpheight of the player.
* CA_TWINSPIN can now break bustable blocks up and down in addition to breaking horizontally. Also, a spring boost.
* CA_HOVER now uses seperate states/frames, has dashmode support, and falls slowly whilst not moving very quickly.
* CA_SLOWFALL gets the CA_HOVER states/frames and dashmode support too.
* CA_HOMINGTHOK now targets Sea Egg fakes and egg guard shields, and uncurls when there's no target. It also shows a target icon.
* CA2_GUNSLINGER. Uses revitem as bullet. Autotargets within range/angle limitations on similar rules to homing attacks. Shows a target icon.
* CA2_MELEE can now break bustable blocks up and down in addition to breaking horizontally, and plays much more fluidly. Also, a spring boost.
* CA2_SPINDASH allows you to roll when landing on any surface when moving fast enough unless you have PF_THOKKED. Also, fixed you being able to roll forever.

Conversions:
* CA_DASHMODE -> SF_DASHMODE
* CA2_MULTIABILITY -> SF_MULTIABILITY
* player.jumping -> PF_STARTJUMP
* pw_ingoop -> CR_BRAKGOOP
* PF_NIGHTSMODE -> CR_NIGHTSMODE
* PF_SUPERREADY -> P_SuperReady()
* SPR2_SPIN -> SPR2_ROLL
* SPR2_DASH -> SPR2_SPIN
* SPR2_PEEL -> SPR2_DASH
* SPR2_SSTD, other super frames -> see below...

Others:
* Super sprites are now seperated from normal sprites via using S_SUPER lump in a skin, rather than being an explicitly named super version of the lump (which required a ton of effort from us to make super versions of all sprite2 names). Accessible via FF_SPR2SUPER.
* Unlockable skin stuff is now netcode synchronised. We won't be repeating 2.1's bullshit if we can help it!
* Host can't switch their skin if there's any restrictions applied, since that was unfair.
* Unique Attraction Shield sound instead of reusing S3nK Thundercoin sound.
* Character select menu code is defuckened.
* Fixed zoom tube camera distance being borq'd by a bug.
* Hudnames are now padded if they're less than 5 symbols long.
* Instead of jump damage when jumping being controlled directly by SF_NOJUMPDAMAGE, it now indirectly controls it via applying the flag PF_NOJUMPDAMAGE.
* SF_FASTEDGE. Does... a fast edge animation, really.
* Fixed some oversights with the SPR2isation of NiGHTS.
* P_SpawnLockOn(player_t player, mobj_t lockon, statenum_t state) function for Lua allowing the homing target visualisation stuff to be done locally without performing horrible, horrible hacks.
* Objects and sounds for the cork, which CA2_GUNSLINGER's main toter uses.

<root>/toaster/charabilities/ has the testing files outside of patch.dta, which is in master.
* srb2win_branch_charabilities.exe.
* player.dta - can't be used with master executables because of sprite2 renaming plus super stuff.
* socchar.wad - very simple WAD which helps test unlocks for the purpose of netplay.

Please let me know if you have a thunk.

See merge request !76