New staging area (51).
Merge pull request #55 from wtsi-npg/devel

Merge devel for 74.7 release
Merge pull request #56 from wtsi-npg/master

Merge 74.7 back to devel
Remove unused, mispelt and misleading code.
Merge pull request #57 from dkj/devel

Remove unused, mispelt and misleading code.
Add comment with warning and rationale for Perl taint mode
Merge pull request #58 from dkj/devel

Add comment with warning and rationale for Perl taint mode
Merge pull request #17 from wtsi-npg/devel

pull changes from devel