Merge pull request #63 from wtsi-npg/devel

1.12 release
Merge pull request #66 from wtsi-npg/devel

Release 1.13
Merge pull request #70 from wtsi-npg/devel

pull request from wtsi devel to master to create release 1.15
to pass tests after the version update, up the harcoded programVersion field in test data; add TODO note
Merge pull request #71 from wtsi-npg/master

pull changes from wtsi master (version 1.15) to devel