[Tails-dev] [review'n'merge:1.1.1] bugfix/7618-gnome-help

Hi,

bugfix/7618-gnome-help fixes #7618 by installing gnome-user-guide.
That's a regression against Tails/Squeeze, so candidate for 1.1.1
=> please review'n'merge into stable and devel.

Cheers,
--
intrigeri