Merge pull request #8 from iainrb/devel

Add QC metrics, other speedups and improvements
Merge pull request #9 from iainrb/devel

Speedup of NaN/INF check
Merge pull request #10 from wtsi-npg/devel

Release 1.5, QC metrics and speedups
Merge pull request #11 from iainrb/devel

Changes for release 1.6
Merge pull request #12 from wtsi-npg/devel

Merge to master for release 1.6
Merge pull request #1 from wtsi-npg/master

Merge updates from release 1.6
Merge branch 'master' into devel