Deprecate FixedRem.

See merge request STJr/SRB2!952

Move drop shadows to the ceiling for objects in reverse gravity

See merge request STJr/SRB2!973

Clean up some movement code

See merge request STJr/SRB2!912

Traceback

See merge request STJr/SRB2!974

Fix waypoint sequence desyncs

See merge request STJr/SRB2!975

Fix the "Custom skincolors" branch not compiling with GCC 10.

See merge request STJr/SRB2!966

NOWIPE fixes for colormap and title card wipes

See merge request STJr/SRB2!962

Add back side wall scrollers & allow using offsets for tagged wall scrollers.

See merge request STJr/SRB2!955

Possible fix for dedicated server crashes (aka the msvcrt.dll!_mbscat crash)

See merge request STJr/SRB2!963

Allow input buffer to hold more than 64 tics

See merge request STJr/SRB2!950

Custom skincolors

See merge request STJr/SRB2!960

Got_AddPlayer: check that I_GetNodeAddress(node) is non-NULL before using strcpy to copy it to the playeraddress array

Fix crumbling floatbob FOFs in MP SS5 rising up into space for no reason

See merge request STJr/SRB2!961

T_BounceCheese: Fix FOF height desync occurring if the FOF fell down too fast (resulting in a bizarre bouncing back up effect in MP SS5 due to P_FloorzAtPos messing up as a result)

A_SplitShot no target fix

See merge request STJr/SRB2!956

Lua mapthing len

See merge request STJr/SRB2!957

A_SplitShot fix: don't even attempt to A_FaceTarget (or anything beyond) if there is no target to face to begin with

Sprite projection fixes

See merge request STJr/SRB2!954

G_BuildMapTitle for Lua, G_BuildMapName outside of levels

See merge request STJr/SRB2!694

on second thought maybe we don't need extra tx clamping, it turns out to be more effort than it's worth (at least for now)

meanwhile, let's move x/yscale calculations down since we don't actually need them until later on

this makes it so that higher fov values can actually let you see all the sprites that should be in the view