explicative comments; some cleanup suggested.
OpenRunningTimeout: settable, while it was only default value. FIX to events_per_lumi casting, which had effect only when not set and falling on default value
add default in second place, for OpenRunningTimeout
Merge pull request #8 from franzoni/add_OpenRunningTimeout_gf_20141111

OpenRunningTimeout + FIX to events_per_lumi casting