Code maintenance: change quoted include statements to angular brackets. Add the odd licence statement

Move generator status setting to common place

GenerationActionInit: declare properties to access number of processed runs and events

We no longer test with ROOT 6.22, and in 6.32 PyROOT is coming back but subtly fails on macOS

Avoid having another level of quotes or b'' showing up in the wrong places

Typename: do not inherit from std::pair because ROOT stopped working for this construct for some reason