Wings 2.2.5

[dgud]

Made a new release

There have been a lot of changes in the build setup so I leave it as dev release
until confirmed that it works, so please test.

Changes include:

- Added wings_convert script for batch conversion of models. [dgud]

- Linux installer now accept an optional Install-Dir argument [dgud]

- When exporting ".gltf/.glb" swap_y_z and scale options was ignored. [dgud]

- Fixed importing non-square 'dds' textures with mipmaps
which caused an eternal loop. Thanks Simon Griffiths. [dgud]

- Fixed crash when trying to edit area ligth properties
and not selecting an area ligth. Thanks Lars Thorsen. [dgud]

- Fix ttf text plugin error handling. Thanks Hank. [dgud]

- Add more search dirs for fonts. [dgud]

- Rewrote "Text" primitive, it can now handle more truetype
formats, collection files (.ttc) and opentype (.otf) files. [dgud]

- Fix lost text focus in dialogs. [dgud]

- Allow image drag'n'drop from outliner to autouv to change
background image in autouv. [dgud]

- Fixed updating mipmaps when updating dds files. Thanks Vershner. [dgud]

- Fixed rendering bug when editing materials with vertex colors. Thanks Hank. [dgud]

- The option "File->Save Selected" was saving images not used by the
selected object(s); Thanks Hank [Micheus Vieira]

- Added an exporter to OpenJSCAD file format (.jscad); [micheus]

- Added a minimal warp mouse camera workaround see 'Options/Misc/' tickbox.
Enable it and test again if you have problems.