Merge pull request #30 from wtsi-npg/devel

wtsi-devel to my devel
Merge remote-tracking branch 'wtsi/devel' into devel
code improvements, POD, PBP
RSC keywords removed; appropriate usage of Readonly module; $VERSION variable added to scripts and modules where it was missing; distribution test reconfigured to test for correspondence of teh packag eand module versions
build file - remove Readonly module as prerequisite since it is not needed anymore for teh evaluation of of the $VERSION variable; change version of files and modules whenever ACTION_code method of the builder is run
Merge pull request #156 from mgcam/devel

RSC keywords removed, build procedure refined, appropriate use of Readonly module