updated the documenation for SortSam where it was somewhat misleading
updated the documenation for SortSam where it was somewhat misleading

alecw/picard,alecw/picard,broadinstitute/picard,broadinstitute/picard,alecw/picard,broadinstitute/picard,alecw/picard,broadinstitute/picard,broadinstitute/picard