Squashed commit of the following:
commit aec8628f15801c42374414b13597f2d66ce98748
Author: Eric A. Miller <emiller@cpan.org>
Date: Tue Sep 3 19:31:05 2013 -0400
another try at fixing duplicate pos
commit 7ab021a6adecdf32056ba96c3e1388b639e7cf2b
Author: Eric A. Miller <emiller@cpan.org>
Date: Mon Sep 2 22:38:05 2013 -0400
alternate fix for dupe pos
commit cae64c8fd882fd091446b93a6c8dc7163e9c0e91
Author: Oliver Gorwits <oliver@cpan.org>
Date: Mon Sep 2 22:05:45 2013 +0100
alternative building of modules tree using splice for dupe pos
commit 980e45211b062c8717ff57625ad4d7b80f942886
Author: Oliver Gorwits <oliver@cpan.org>
Date: Mon Sep 2 22:05:19 2013 +0100
fix for updating pos "column" value
e291e0b773