as walker attributes or from the command-line. Not ready yet! Downsampling/deduping
works in a general sense, but this approach has not been completely optimized or validated.
Use with caution.
git-svn-id: file:///humgen/gsa-scr1/gsa-engineering/svn_contents/trunk@3392 348d0f76-0448-11de-a6fe-93d51630548a
simplification of some of the locus traversal code.
git-svn-id: file:///humgen/gsa-scr1/gsa-engineering/svn_contents/trunk@2886 348d0f76-0448-11de-a6fe-93d51630548a