doc: no longer depend on obsolete URLs.
doc: no longer depend on obsolete URLs.

In master the images are part of the documentation itself, so there is no
URL needed.

	* doc/urbi-style.cfg: here.

aldebaran/urbi,urbiforge/urbi,urbiforge/urbi,aldebaran/urbi,aldebaran/urbi,urbiforge/urbi,urbiforge/urbi,aldebaran/urbi,aldebaran/urbi,aldebaran/urbi,urbiforge/urbi,urbiforge/urbi,urbiforge/urbi,urbiforge/urbi,aldebaran/urbi,urbiforge/urbi,aldebaran/urbi