v0.3.0

Binary renamed: The binary was renamed from seqtool to st, because
typing the rather long name repeatedly can be tiring (-: The documentation
was updated accordingly

New commands:

• view command for viewing sequences in terminal with colored background

Changes / additions:

• Seqtool now handles quality scores associated with sequences. This includes:

  • Support for converting between FASTQ format variants
  • The exp_err statistics variable, which represents the total number of expected
    errors in a sequence, according to the quality scores. This allows filtering
    by sequence quality as done by fastq_filter from USEARCH and VSEARCH
  • 454-style QUAL files can be read an written

• --format renamed to --fmt, and --outformat renamed to --to

• The former txt format is now tsv (including the option --to-tsv).

Bug fixes:

• seq_io was updated, containing two small bug fixes. Both bugs were very
  unlikely to be hit and of low severity