- fix missing doxygen version in PDF docs created by CMake
- remove unnecessary quotes ('...') from version numbers and
Git revisions (previously added for debugging purposes)
- fix navigation links at the bottom of tutorial pages (HTML only)
- remove 'D. Gibson' from documentation headers on his request
* CMake integration, no autotiools
* alignment panel is now correctly renamed to setting panel
* source view is now correctly renamed to code view
* Merge FLTK FLUID docs into FLUID user manual.
* Add two simple entry tutorials
* Remove FLUID chapter form FLTK docs.
* GitHub action to generate HTML and PDF docs and
make the available as artefacts
* this commit introduces a few FIXMEs and TODOs that probably
can't be solved until we do some major refactoring. They work for
now, but adding more layout controlling widgets will be hard.
