Added map scripting capabilities to UDB (#656). Documentation at https://biwa.github.io/udbscript-docs/

ZScript parser: fixed a bug where trying to parse the undocumented alternative array declaration syntax failed. Fixes #645

Fixed an issue where thing positions were modified even when the new position was the same as the old one. Fixes #644

ZScript parser: fixed a bug where included files where parsed when the #include directive was encountered, and not after the rest of the file was parsed. Fixes #641

Visual Mode: fixed a bug where textures on 3D floors were not scaled correctly when using the upper/lower texture 3D floor flags. Fixes #640

Script editor: added support for the //$Skip editor in scripts. Adding this line will not add the next script to the drop down list of available scripts for the ACS actions in the thing and linedef editor dialogs. Resolves #636

Image Exporter: added option to chose between taking sector colors into account or not when exporting. Resolves #635

Image Exporter: fixed a bug where texture scales were not taken into account when exporting. Fixes #634

ZScript: fixed a problem where whitespace between a state label and the colon resulted in a parsing error. Fixes #631

(G)ZDoom game configuration: added several missing UDMF fields for linedefs and sectors, so that they show up in the custom tab. Fixes #628

UDMF reader/writer: fixed a bug where unknown top level fields and blocks were not preserved. Fixes #627

Visplane Explorer: fixed a bug where changing the settings after re-entering the mode would result in a crash. Fixes #624

Fixed a problem where floating point numbers for actor radius and height were not interpreted correctly. Fixes #623

Added an option to run commands before and after resources are reloaded, and before testing a map. This option can be accessed from the map options dialog.

Eternity Engine game configuration: it's again possible to set the floor and ceiling brightness independently from the sector brightness

Dehacked: Dehacked files are now properly loaded from directories

Game configurations: added option to enable/disable GZDoom style distinct brightness for walls/ceilings/floors. Fixes #618

Visual Mode: added some safeguards against potential crashes that should never happen. Potentially fixes #614

Sectors Mode, Linedefs Mode, 3D Floor Mode, Grid Setup: fixed a problem where textures were not shown in Windows's high contrast mode. Fixes #612

Fixed a problem where generalized effects could output a warning if they are made up of multiple bits (like in the MBF21 generalized sector effects)

Texture Browser: fixed a problem where cycling through the width and height jumped to 196 instead of 192. Fixes #613

Eternity Engine game configuration: fixed a problem where the Friendly and Dormant flags were not correctly pasted in Doom format.

Eternity Engine game configuration: fixed a problem where the 3DMidTex flag was not correctly pasted in Doom format. Fixes #606