Expose act number drawing functions to Lua

See merge request !1532

Cut cv_hidetime's minimum value to 1 (resolves #586)

Closes #586

See merge request !1544

Add player mobj check to P_PlayerInPain (resolves #640)

Closes #640

See merge request STJr/SRB2!1587

Add a missing scale assignment to A_Boss3ShockThink

See merge request !1588

Split up x/y/z averages in A_Boss3ShockThink (resolves #589)

Closes #589

See merge request !1538

Add proper parameters to MobjMoveBlocked so you can actually tell what you're being blocked by (Resolves #332)

Closes #332

See merge request !1491

Don't call map load trigger linedefs when joining or reloading gamestate

See merge request !1592

Fix minor issues with folder addons

See merge request !1617

Replay overwrite fix

See merge request STJr/SRB2!1523

Fix antique ghost netvars

See merge request !1545

Fix issue with png_get_tRNS

See merge request !1606

Add VERSIONSTRING_RC to DEVELOP builds for compiler compatibility

Closes #663

See merge request !1607

Remove camera dependency from P_GetPlayerControlDirection

Closes #183

See merge request !1512

Fix incorrect error message during Lua archiving

See merge request !1593

Allow Lua write access to camera_t variables & expose the cameras globally

See merge request !1581

Add flag to line slopes for even more slope copying

See merge request !1550

Fix gme support being effectively disabled

See merge request STJr/SRB2!1586

Fix #649

Closes #649

See merge request !1604

Polish the Lua input library

See merge request STJr/SRB2!1598

Implement folder loading

See merge request !1568

Refactor weather switching (fixes #541)

Closes #541

See merge request !1498

V_DrawCroppedPatch(...) Lua exposure and improvements

See merge request !1316

Add generalized slopes in UDMF

See merge request !1530

Make the colormap returned by v.getColormap() writable.

See merge request STJr/SRB2!959

Makefile: Improve gcc detection

See merge request !1608

Make next compile again

See merge request !1611

Add my full name in the credits

See merge request STJr/SRB2!1610

Wasn't working for me until I fixed it.
Turns out gcc really doesn't like giving its name out.
Most of the time it reads argv[0].

This fixes an oversight where the return value of png_get_tRNS was
being ignored.