Draft: Updating generation Configurables to enable use of MadGraph
Updating the configurables option for generation to adapt them to the new interfaces in !151.
A more detailed explanation with diagrams, and on how to test it can be found here https://codimd.web.cern.ch/JtD7xAGqS6S9eSIyfmKqRA#.
Closes #39
Edited by Gloria Corti