[doc] use the metalogo package
prepare for CTAN release

* update NEWS
* update README
add copy of the gpl 2.0

Lualibs are derived from Context, which is GPL, even though its
license statement may be misleading. See this explanation by
Taco: http://tex.stackexchange.com/a/12456/14066
update makefile
fix dtx

ceterum censeo dtx esse abolendum
Makefile: include lualibs.lua in CTAN rule
fix Makefile; doc as toc again
Merge pull request #6 from phi-gamma/master

prepare release