formatter: separate required from optional but otherwise keep ordering
the same, reorder GATK arguments by usage.
git-svn-id: file:///humgen/gsa-scr1/gsa-engineering/svn_contents/trunk@764 348d0f76-0448-11de-a6fe-93d51630548a
the pathway from command line to traversal engine.
git-svn-id: file:///humgen/gsa-scr1/gsa-engineering/svn_contents/trunk@727 348d0f76-0448-11de-a6fe-93d51630548a
Also fixed a bug where we'd exception-out if we didn't provide a interval region.
git-svn-id: file:///humgen/gsa-scr1/gsa-engineering/svn_contents/trunk@669 348d0f76-0448-11de-a6fe-93d51630548a