Merge pull request #14 from wtsi-npg/devel

pull request from wtsi devel to master to create release 56.4
Merge remote-tracking branch 'upstream/devel' into HEAD
Merge pull request #19 from wtsi-npg/devel

pull from wtsi devel to master: create release 56.6
Merge pull request #20 from wtsi-npg/master

pull release 56.6 from wtsi master to devel