For each read, find the nearest annotated region from a BED file.

For example, if you have a BED file with the transcription starting site (TSS)
for all genes in the genome, this will find the nearest TSS for each read, and
report the distance to the site.

Usage: bamutils nearest {-max val} filename.bam regions.bed

Options:
  -max    The maximal distance to look for a nearest region
          (default: 100K)