[book] add autoload section from code and fix sphinx warnings
* drop misleading faq entry since clear explanation can be found in internationalization chapter
* use autodata sphinx directive instead of raw text
* fill empty chapter with autodoc:
- devweb/httpcaching.rst
- devweb/resource.rst
- devweb/views/idownloadable.rst
- devweb/views/wdoc.rst
* use shebang in excerpt to denote shell code
* fix some bad indented docstrings in javascript files
Document: cubicweb-doc
Title: CubicWeb documentation
Author: Logilab
Abstract: Some base documentation for CubicWeb users and developpers
Section: Apps/Programming
Format: HTML
Index: /usr/share/doc/cubicweb-documentation/index.html
Files: /usr/share/doc/cubicweb-documentation/*.html