Log Message:
biology/vsearch: import vsearch-2.13.3

VSEARCH supports de novo and reference based chimera detection,
clustering, full-length and prefix dereplication, rereplication,
reverse complementation, masking, all-vs-all pairwise global
alignment, exact and global alignment searching, shuffling,
subsampling and sorting. It also supports FASTQ file analysis,
filtering, conversion and merging of paired-end reads.

The aim of this project is to create an alternative to the USEARCH
tool developed by Robert C. Edgar (2010).