Squashed 'src/samtools/' content from commit 356afda

git-subtree-dir: src/samtools
git-subtree-split: 356afda994dd787da7e3c6ef7c7462884e2a8795
Merge commit 'b6347929e746d01e30e6265bfd3bb3fe39fa7f57' as 'src/samtools'
ignore to-mr binary file