SARG documentation

Hello,

I promised to write a short version of the SARG documentation to Erik, so here it is: http://wiki.ipfire.org/en/addons/sarg

I don't really know what to write, because using SARG is pretty easy and there is nothing to configure.

If now someone could please add some screenshots and do the translation to the other languages, that would be fine.

I did not link the SARG documentation page anywhere, because I did not know where it would fit.

Best, -Michael