Fix animated skincolors in OpenGL (resolves #187, #247, #301, #370)

Closes #187, #247, #301, and #370

See merge request !1301

Player-Colored Elemental Fire for competitive gametypes

See merge request STJr/SRB2!1312

Fix double free occuring when unloading the intermission patches

See merge request !1304

Final lap text for circuit

See merge request !1303

Fix SPC looping on libgme versions >= 0.6.3

See merge request !1302

Fix intro crash

See merge request !1310

Add aPNG downscaling

See merge request STJr/SRB2!1197

Make player->speed and other things use R_PointToDist2

See merge request !1309

Add Zolton and Ors to the credits

See merge request !1308

Kill remaining HAVE_BLUA and SEENAMES

See merge request !1319

Lua: Allow access to skin.sprites[]

See merge request !1238

Fix HWR_DrawCroppedPatch scaling a patch when cropping the top and left sides.

See merge request !1297

Saloon door fixes (closes #394)

Closes #394

See merge request !1296

Make caret coloring support letters.

See merge request !1295

Fix brak barrier size (Closes #139)

Closes #139

See merge request !1294

Fix objects with MF_FIRE disappearing in lava (Closes #366)

Closes #366

See merge request !1287

Fix some stuff I missed when rebasing `spritestuff2` to `dehacked-hell`... oops

See merge request !1286

ffloorclip fixes (resolves #385 and #391)

Closes #385 and #391

See merge request !1284

Fix a division by zero in BCZ2 Metal Sonic's routine

See merge request !1283

Fixargstr

See merge request !1280

Initialize dummy linedef tag lists

See merge request !1279

Make P_DoSuperTransformation (with giverings) only set 50 rings if you have less than 50

See merge request !1278

Send a `quitting` argument to the GameQuit Lua hook.

See merge request !1276

Disallow pk3s with extra bytes

See merge request !1275

Allow non-player objects to apply the CR_PLAYER carry type without crashing the game

See merge request !1274

Fix TC_DASHMODE not accessible to v.getColormap; add missing skin flags

See merge request !1273

Fix normal one-up sound playing in Mario mode

See merge request !1272