Change Log
1.004 21 Mar 2009 Initial release
1.005 24 Jan 2015 Permute the empty list per Philipp Rumpf
1.006 25 Jan 2015 Break memory loop per Philipp Rumpf
1.007 25 Jan 2015 World writables set correctly using some excellent perl from http://www.perlmonks.org/?node=bart