src/clfswm-autodoc.lisp (produce-conf-var-doc-html): Produce a documentation for all configurable variables in CLFSWM - HTML version.

src/clfswm-autodoc.lisp (produce-all-docs): Produce a documentation for all configurable variables in CLFSWM.

src/clfswm-expose-mode.lisp (expose-mode-display-accel-windows): New functions. Add a window on each child in the expose mode to quickly select them.

Massive update: Fast layout switch, switch to last child, color nearly everywhere (Help, keys...), simple way for corners configuration, auto-doc on corners, show configuration variables