Fold library regression tests into tutorial.
Tutorial reorg.
Fix typo.
comma
Fix.
Rework the introductory tutorial tract.
Bump version
Merge branch 'flx_world'
Copy css files too.
Basic edit window.

Add ?edit at the end of a C++ or Felix file
and the text comes up in an edit window.
No colour or anything yet. Just a place to start.

Dues to some weirdness Felix *.fdoc source code
is fine but tutorial *.fdoc pages aren't.
Something to do with the crud the webserver itself
addes around tutorial pages (next/prev buttons).
Prototype edit plugin.
Get colour in the edit window.
Fix edit mode.
Need string.h
Small bug
Minimal code mirror in neutral place.
Edit a bit better.
Fixup code mirror a bit more.

Add a save button.
Implement basic "POST" hander in webserver.
Add --static option to flx_build_rtl.

Throw in some more modes for CodeMirror.
Fix bug.