Fix disabling step up/down not working

See merge request !1219

Fix stupid divide-by-zero error when leaving servers

See merge request !1240

Let the server or an admin toggle clients' custom shaders

See merge request !1181

Fix hyperwalls

See merge request !1232

Whitelist missing graphics

See merge request !1189

Compare PNG palettes with the game's palette, instead of assuming they are the same

See merge request !1185

The lump is not needed for P_WriteThings

See merge request !1231

EMERGENCY: By default use the old gif_dynamicdelay v1 behavior, but keep v2 as an option.

See merge request !1236

Improve support for metatables in netgames

See merge request !1224

Resend gamestate when resynching

See merge request !829

Remove 3 wasteful bytes of guaranteed blank memory from some place where it's not gonna matter that much

Give the GIF recorder some memory so frame delays are a little more accurate

See merge request !1198

Expose gamestate to Lua

See merge request !1229

Cmake: fullscreen fix

See merge request !1226

Fix compiling using cmake if internal libs is used

See merge request !1225

Fix some copyright statements in new files

See merge request !1223

UDMF Seg length crash fix

See merge request !1221

Fix objectplace -silent

See merge request !1214

Ghost mobj matches rollangle (Closes #362)

Closes #362

See merge request !1211

Dash state for Tails overlay (Closes #325)

Closes #325

See merge request !1210

Use SSE3 in 32-bit x86 binaries

See merge request !1213

Draw save files from outwards in

See merge request !1228