appendix_porting.xml: Add doc section.

2011-02-08  Benjamin Kosnik  <bkoz@redhat.com>

	* doc/xml/manual/appendix_porting.xml: Add doc section.
	* doc/xml/manual/appendix_contributing.xml: Split out doc bits to...
	* doc/xml/manual/documentation_hacking.xml: ...here.

	* doc/xml/manual/debug_mode.xml: Adjust.
	* doc/xml/manual/prerequisites.xml: Adjust.
	* doc/Makefile.am (xml_sources): Add dot files,
	documentation_hacking.xml.
	* doc/Makefile.in: Regenerate.

	* doc/xml/manual/build_hacking.xml: Use absolute paths for images.
	* doc/xml/images/confdeps.pdf: Add.

From-SVN: r169932