librsvg has too many bugs to be used for build-time SVG extraction.
So I will just leave out my extraction script (for the time being) and
simply commit all extracted SVGs (with Inkscape through a script).
The gray inversion script works fine though, so no need to commit
Symbolic-inverted icons.
You can now set any paint tool to mirror painting relatively
horizontal/vertical axis or a central point (any combination of these 3
symmetries).
This has been implemented as a new multi-stroke core, where every stroke
is actually handled as a multi-stroke (default of size 1).
This is also the first usage of custom guides for symmetry guiding.
Current version has to be activated in the playground.
Jehan