Add literate build plugin configuration step 1

Literate build plugin is an experimental plugin from Stephen Connolly
which reads the job definition from the contents of the README file
and a few files from a top level .jenkins directory.

Futher changes needed in this prototype include:

       Add coverage trend reporting
       Add windows and linux
       Add java-1.6 and java-1.7 compilation variants
       Verify each of those additions works as expected
Add literate environment definition