Enable BAM streaming to bamfilterrg for samtools
Enable BAM streaming to bamfilterrg for samtools

Fix for #116 that supports BAM streaming for both samtools and sambamba.
Thanks to @cc2qe

cc2qe/lumpy-sv,arq5x/lumpy-sv,hall-lab/lumpy-sv,arq5x/lumpy-sv,arq5x/lumpy-sv,arq5x/lumpy-sv,arq5x/lumpy-sv,hall-lab/lumpy-sv,cc2qe/lumpy-sv,hall-lab/lumpy-sv,hall-lab/lumpy-sv,cc2qe/lumpy-sv,cc2qe/lumpy-sv,hall-lab/lumpy-sv,cc2qe/lumpy-sv