It was less clear/greppable what "installer" refers to...
or maybe so it seems to me.

These have been proofread somewhat to correspond
to the current state of affairs; a missing one
was added for fonts feature.

Minor tweaks to toplevel docs as well as some doc/*.txt,
doc/variables.txt renamed to doc/params.txt, and a brand new
doc/pkglists.txt is added (thanks manowar@ for his considerations).