* doc/cuirass.texi: Add "Database" node.

* doc/cuirass.texi (Introduction): Fix typos and use American English
spelling.

Co-authored-by: Maxim Cournoyer <maxim.cournoyer@gmail.com>

* doc/cuirass.texi (Contributing): Describe how to send patches.

* doc/cuirass.texi (Contributing): Use "bug-cuirass@framalistes.org" email
address.

* bin/cuirass.in (%options): Add "--port" and "-p" command line options.
(show-help): Adapt.
(main): Set default to 8080.  Call 'run-cuirass-server' with this.
* src/cuirass/http.scm (run-cuirass-server): Display the port number.
* doc/cuirass.texi (Invocation): Document new option.

* doc/cuirass.texi (Overview): New chapter.

* doc/cuirass.texi (Continuous Integration): Make it a section of
the 'Introduction' chapter.

* doc/cuirass.texi (Introduction): Write it.

* doc/cuirass.texi: Use "Build automation server" instead of "Continuous
Integration Tool".

* doc/cuirass.texi: New file.
* doc/fdl-1.3.texi: Likewise.
* Makefile.am (info_TEXINFOS, doc_cuirass_TEXINFOS): New variables.
* dir-locals.el: Use the American dictionary for Texinfo mode.
* .gitignore: Update.