Prepare 3.6.

Use google adsense tag of foundation for doxygen doc pages.

Version is no more encoded int odoxygen.

Merge remote-tracking branch 'origin/3.5' into 3.6

Conflicts:
	ChangeLog
	build/debian/changelog
	build/doxygen/dolibarr-doxygen.doxyfile
	build/exe/doliwamp/doliwamp.iss
	build/makepack-dolibarr.pl
	build/rpm/dolibarr_fedora.spec
	build/rpm/dolibarr_generic.spec
	build/rpm/dolibarr_mandriva.spec
	build/rpm/dolibarr_opensuse.spec
	htdocs/compta/facture/impayees.php
	htdocs/filefunc.inc.php