Merge pull request #43 from dkj/devel

Use updated DBIx::Class::Schema::Loader
Merge pull request #45 from wtsi-npg/devel

pull changes from wtsi devel  - for release 74.3
Merge pull request #46 from wtsi-npg/master

pull from master to devel (tag 74.3 )
Remove meta porgramming BUILD method to fix memory leak - fallback to more basic method of wrapper methods for all delegated methods.
Create readonly list of delegated methods from hash instead of function