Expose player.skin and player.availabilities to Lua as Read-only

See merge request !1269

Expose mapheader_t's selectheading option to Lua

See merge request !1268

Prevent non-CA2_SPINDASH characters from getting crushed by roll-jumping into a crevice

See merge request !1267

Fix crash when trying to use bitwise NOT on true/false/nil

See merge request !1262

Fix a Few Spin Related Bugs (Closes #286 and #360)

Closes #286 and #360

See merge request !1256

Fix emeralds,  tokens, etc not resetting when restarting marathon mode in first level

See merge request !1252

Fix reloadbans clearing ban.txt and clearbans not actually saving the changes

See merge request !1215

# Conflicts:
#	src/dehacked.c
#	src/dehacked.h

Fix PlayerCmd not handling angle and aiming correctly

See merge request STJr/SRB2!1265

Only call the Lua API for overridden actions

See merge request STJr/SRB2!1254

Split dehacked.c into multiple files.

See merge request STJr/SRB2!1222

Some fixes for spritestuff2

See merge request !1264

Fix a dumb typo of luaL_checklstring i made whoops

See merge request STJr/SRB2!1266

Revert "Fix no spin characters being able to damage enemies with their jump out of a spin without removing PF_SPINNING"

This reverts commit ad9bf608.

Make several Lua global variables writable.

See merge request STJr/SRB2!1233

Improved sprite sorting against 3d floors

See merge request STJr/SRB2!1235