Xubuntu docs and Ubuntu-Server docs

[Jani Monoses]

> Including yelp will also make help work in gnome-system-tools and other 
> apps where hard GNOME dependencies were removed and the apps calls out 
> to yelp to display the docs. Those who do not have yelp get an error 
> dialog, others see the docs.

Which makes me think about how this adding of GNOME apps is actually is 
a help to Xubuntu/Xfce.
"Look we can have all those apps and still be a lighter desktop". As 
opposed to "You have those apps but we are lighter".

Apps run explicitly are not the ones that cause the bloat we all see.
If the base system or GTK is slow or font rendering got worse there is 
really not a solution to strip away features that have nothing to do 
with it.

It will remain slow but also poorer.

So people deflecting to Fluxbuntu are actually showing that GTK/Xfce are 
not immune to the slowdown, otherwise they would just have removed the 
extra GNOME apps and be happy.

Jani