This add a new feature requested by Oli and Dave

A new output file is created, this count jobs per workflow.
This file is intended to be private, not published in SSB.
Also a new feature: I sent email via python so there is no need of 2 additional shell scripts
Merge pull request #35 from lucacopa/jobs_per_workflow

This add a new feature requested by Oli and Dave
Merge branch 'master' into test-john