[book] several fixes in the rst files
- prevent duplicate markup definitions,
- use existing Workflow markup instead of redefining one (in baseschema.rst)
- include dataimport
- fix non-existant directive autodocfunction
- remove the empty 'embedding.rst' file
include *.py
include */*.py
recursive-include data *.gif *.png *.ico *.css *.js
recursive-include i18n *.po
recursive-include wdoc *