Merge pull request #12 from wtsi-npg/devel

Devel
Merge pull request #13 from wtsi-npg/master

srl changes
Merge pull request #67 from wtsi-npg/devel

Devel
Merge pull request #69 from wtsi-npg/devel

Devel
Merge pull request #14 from wtsi-npg/devel

Devel
Merge pull request #71 from wtsi-npg/devel

Devel
Merge pull request #15 from wtsi-npg/master

update
Bug fix re return values from makeSurvTable()
Merge pull request #72 from jenniferliddle/master

Bug fix re return values from makeSurvTable()