Change SKINCOLOR_SUPERGOLD1-5

See merge request STJr/SRB2!805

Don't skip the first directory entry of PK3 if it's a file

See merge request STJr/SRB2!764

Cvars returned by CV_FindVar did not work with userdataType

See merge request STJr/SRB2!754

Let MUSICDEF set loop point

See merge request STJr/SRB2!762

Skin flag for disabling super colors in NiGHTS

See merge request !782

Lua hook cleanup

See merge request !851

Delete singleplayer

See merge request !870

Fix disconnected players being kicked for high ping

See merge request !866

Standardize the behavior of FF_INVERTSIDES and FF_INVERTPLANES

See merge request !863

Demos refactor

See merge request !853

P_HomingAttack related fixes

See merge request !836

Fix lib_setSpriteInfo indexes being off-by-one

See merge request !854

Updates and fixes for the ZB config

See merge request !859

Delete slopes

See merge request !857

Skip empty gametypes in level select menu

See merge request !819

Remove the multi-file ZB configs. We're stick with the single-file config for ZB and doing all the UDMF stuff in UDB

# Conflicts:
#	src/g_game.c

(also update g_demo.c)

Delete Lua

See merge request !852

Create G_FreeGhosts, for the benefit of G_DeferedInitNew (assuming it actually needs to do `ghosts = NULL;` at all)