This was done by manual inspection, and includes a couple of minor license
corrections, e.g. GPL vs LGPL.

for f in `grep '^License:' metadata/*.txt|grep GPL | grep -v GPL-| cut -d : -f 1|sort -u | sed 's,\.txt,,'|cut -d / -f 2`; do echo $f; find build/$f/ -iname '*license*' -o -iname 'COPYING*' -o -iname 'notice*' | xargs less ; done

#234