Implement per-texture offsets in UDMF

See merge request STJr/SRB2!2018

Optimize field lookups in Lua metatables

See merge request STJr/SRB2!2024

Fix segfault when ghost dies from a death pit

Closes #999

See merge request STJr/SRB2!2026

Interpolate Models when Scaling Mobjs

See merge request STJr/SRB2!2021

Fix Flung Spheres not using the Blue Sphere collection effect

See merge request STJr/SRB2!1995

Fix Camera Interpolation Never Being Reset (Resolves #1026 and #976)

Closes #976 and #1026

See merge request STJr/SRB2!2008

Fix IPv6

See merge request STJr/SRB2!1612

Interpolate Shadows when Scaling Mobjs

See merge request STJr/SRB2!1986

Refactor P_CheckSector

Closes #870

See merge request STJr/SRB2!1946

Rewrite F_SkyScroll to fix overflows

Closes #1008

See merge request STJr/SRB2!1985

Hannu's "LUA_EnumLib optimizations for constant value access" with fixed merge conflict

See merge request STJr/SRB2!2017

[SUGOI] Multiplayer emblems

See merge request STJr/SRB2!1756

Port increment_move radius clamps from Ring Racers

See merge request STJr/SRB2!2013

Add HUD icons for timed NiGHTS powerups

See merge request STJr/SRB2!1949

Small text colormap tweaks

See merge request STJr/SRB2!1971

Fixes inconsistencies with thin players, like with Liftoff Gantry's scale section, and with large characters colliding with steep slopes instead of going up them.

Noticed some oddities with D_MapChange here with very rarely not changing player position when the map is loaded.

Don't give completion emblems when getting a game over in multiplayer (or any other kind of level reset)