Let Lua access key presses, mouse properties, and joystick properties

See merge request !1436

# Conflicts:
#   src/lua_script.c

Restore toggle for Robo-Hood to not jump away from nearby players.

See merge request !1548

Ignore a linedef tag of 0 when using linedef action 96.

See merge request !1543

With added textual contrast.

NOOBJDUMP=1 and NOUPX=1 have been removed. Make 'dump'
target to disassemble. UPX=upx to compress executable.

Setting UPX used to cause it to fail. That has been fixed.

Allow P_CheckSight to see through FF_FOG FOFs

See merge request !1546

Replace "II" in credits with "2" for consistency

See merge request !1547

Kart cmd->latency port

See merge request STJr/SRB2!1470

Restore P_AproxDistance Lua parity

See merge request !1531

Expose `metalrecording` global to Lua.

See merge request !1536

Fix console text bleeding

See merge request !1434

Handle invalid blend modes

See merge request !1486

Allows Lua to transport you to a different map in place of a Special Stage.

See merge request !1368

Compile with -rdynamic for UNIXCOMMON platforms

See merge request !1481

Fix the console splitting up halfway through startup.

Closes #349

See merge request STJr/SRB2!1494

Fix models interpolating to frame 0 from a same-sprite2 FF_SPR2ENDSTATE state

See merge request !1515

Enhance the multitagging functionality added by !1485

See merge request !1524

Some more intermission features for Lua

See merge request STJr/SRB2!1329

A_Custom3DRotate scale fix

See merge request STJr/SRB2!1525

Have Metal Sonic use spinheight while dashing

See merge request !1382

Flicky mapload crash fix (and other tmthing-related fixes)

Closes #81

See merge request STJr/SRB2!1522

Expose M_MapNumber to Lua

See merge request !1521

I have no idea why software does this.

See merge request !1517

Expose P_ButteredSlope to lua

See merge request !1397