2. Added a shell for the indel cleaner walker (it's currently being used to test the interval traversal).
3. Fixed small bug in downsampling (make sure to downsample the offsets too)
4. GenomeAnalysisTK.execute => anyone object to my change to "instanceof" instead of trying to catch a ClassCastException (yuck)?
git-svn-id: file:///humgen/gsa-scr1/gsa-engineering/svn_contents/trunk@524 348d0f76-0448-11de-a6fe-93d51630548a