Initial check-in of SQ tag codec.
Initial check-in of SQ tag codec.

annkupi/picard,broadinstitute/picard,annkupi/picard,broadinstitute/picard,nh13/picard,broadinstitute/picard,alecw/picard,annkupi/picard,nh13/picard,annkupi/picard,broadinstitute/picard,alecw/picard,alecw/picard,nh13/picard,nh13/picard,alecw/picard,broadinstitute/picard