Merge pull request #141 from mgcam/devel

lims samplesheet driver update
Merge pull request #142 from wtsi-npg/devel

pull request from wtsi devel to master - release 76.2
Merge pull request #143 from wtsi-npg/master

Pull request from wtsi-npg master to devel (release 76.2)
some unused code removed; some small test scripts merged into related larger test scripts; VERSION variable and headers with SVN properties removed from test files; all test scripts are given .t extension; unnecessary "use" statements removed from tests