Cathpy

*Release date: 11/10/2019*

* improved amino acid checks
* fixed bug with warning message when parsing stockholm alignments from string

*Release date: 21/06/2019*

* changed new_from_(file|string|io) to from_(file|string|io)
* cathpy.release container classes retrieve via primary key (eg. domainlist[0] === domainlist['1cukA01'])
* added codecov

*Release date: 20/06/2019*

* added `cathpy.release` to read/write/query CATH release files

*Release date: 12/06/2019*

* allow for null results from funfhmmer scan

*Release date: 30/05/2019*

* results from `align.get_meta_summary` now returns as AlignMetaSummary

*Release date: 30/05/2019*

* generate summary of alignment meta data `align.get_meta_summary`