Properly fix bot showing up in NiGHTS stages (resolves #261 for real).

Closes #261

See merge request STJr/SRB2Internal!417

Dashmode polish

Closes #266

See merge request STJr/SRB2Internal!418

Knuckles changes: the fixes

See merge request STJr/SRB2Internal!428

THZ goop and Elemental (Resolve #260, I hope?)

Closes #260

See merge request STJr/SRB2Internal!419

Papersprite end signpost

See merge request STJr/SRB2Internal!442

I_Error if memory allocation size overflows

See merge request STJr/SRB2Internal!426

Custom gamedata parameter

See merge request STJr/SRB2Internal!423

RVZ1 lag reduction

See merge request STJr/SRB2Internal!445

Prevent infinite lives rollover to extremely negative numbers.

See merge request STJr/SRB2Internal!446

Fix pmomz (resolves #64!?)

Closes #64

See merge request STJr/SRB2Internal!447

Kill the new compiler errors (since GCC 9?)

See merge request STJr/SRB2Internal!448

So I don't know what a skin wad is... (closes #282)

Closes #282

See merge request STJr/SRB2Internal!449

Fix players being launched by slopes and pmomz when dying.

See merge request STJr/SRB2Internal!452

Magical moving fire

Closes #278

See merge request STJr/SRB2Internal!453

Let players roll AND move after spinning off a wall transfer

Closes #274

See merge request STJr/SRB2Internal!456

2.2 Title Screen

See merge request STJr/SRB2Internal!439

Lach wanted to do this, but we might have a release candidate before he gets back, so did it myself.

Make the wall transfer while spinning PF_SPINNING|PF_THOKKED. This:
* Prevents PF_MULTIABILITY players from using their ability after a wall transfer.
* Has a more specialised case which allows players to roll after having wall-transferred while spinning.
* (side effect) allows modders to apply PF_THOKKED any time for more controllable spinning.

Fix silly typo :P

See merge request STJr/SRB2Internal!454

Add support for custom sign color with var2 (shortcut for requests I sometimes got from character spriters in 2.1, e.g. neon green Pointy Sonic using a purple sign)

Restore the last gameplay frame while on the intermission screen

See merge request STJr/SRB2Internal!444

Record attack fixes

See merge request STJr/SRB2Internal!441

Fix warnings when NOPNG=1

See merge request STJr/SRB2Internal!432

Fix some intro fades displaying text in all-caps

See merge request STJr/SRB2Internal!429

Lotsa Continues (resolves #264)

Closes #264

See merge request STJr/SRB2Internal!422

Fix char select music not playing in secrets menu

Closes #272

See merge request STJr/SRB2Internal!421