v8.0.1570 Added fastq_maxee_rate option to fastq_filter.
v8.0.1616 Added -chimarasq and -nonchimerasq output files for uchime_ref and uchime_denovo.
v8.0.1616 Added fastq_maxgaps option to fastq_mergepairs.
v8.0.1611 Added -stripleft, -stripright and -padlen options to fastx_truncate.
v8.0.1616 Added -fastqout_discarded, -fastaout_discarded options to fastq_filter.
v8.1 Improved UTAX algorithm with support for training on user data.
v8.1.1803 Added sample name support to fastq_filter and fastq_mergepairs (see -relabel @ and -sample options).
v8.1.1803 Added -alnout and -rdpout options to utax.
v8.1.1803 Added -otutabout and -biomout options to usearch_global (see Mapping reads to OTUs).
v8.1.8103 Reverse filename for fastq_mergepairs defaults to R1->R2 if -reverse option is not specified.
v8.1.1803 Added -minsize option to cluster_otus. Enables discarding of singletons without an extra step..
v8.1.1811 Added uchime_ref_minpctid option to uchime_ref.