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

See merge request STJr/SRB2!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 STJr/SRB2!1543

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 STJr/SRB2!1531

Expose `metalrecording` global to Lua.

See merge request !1536

Fix console text bleeding

See merge request STJr/SRB2!1434

Handle invalid blend modes

See merge request STJr/SRB2!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 !1522

Expose M_MapNumber to Lua

See merge request !1521

I have no idea why software does this.

See merge request STJr/SRB2!1517

Expose P_ButteredSlope to lua

See merge request STJr/SRB2!1397

No airwalking (from horizontal springs)

See merge request STJr/SRB2!1428

Remove TAG_ITER_DECLARECOUNTER

See merge request STJr/SRB2!1398

Respect mobj->color while enemies & bosses flash (resolves #531)

Closes #531

See merge request !1513

Add badge to readme showing latest stable release

See merge request !1510

Use more readable hex constants in the Software Renderer splat and floorsprite drawers.

See merge request STJr/SRB2!1442

Make a few messages more helpful (resolves #485)

Closes #485

See merge request !1519

Rollout rock improvements

Closes #445, #221, and #532

See merge request STJr/SRB2!1401