Documentation. Shapes tutorial update (not fully translated yet).

Doc. Shapes tutorial update (see Bug #817907 - Linked offsets regression).

Documentation. Updating fixed Shapes and Advanced tutorials. Adding missing references to the Greek Tracing tutorial.

Tutorials. Global tutorials update (see Bug #169020, Bug #672423 and Bug #438307).

Tutorials: Bitstream fonts replaced with sans and serif

Tutorials. New Farsi tutos. Tutorials are now optimized with Scour.

Polish and Slovak tutorials translation update (SVG files).

Polish tutorials translation update (SVG files)

Tutorials update

* [INTL: pl] Updated Polish version of Inkscape tutorials.

Regenerated all tutorials from inkscape-doc primarily to add new tutorials translated into Polish, but also those where some translations existed. Hopefuly not messed around too much.