added new methods to add metadata at notebook level, add prov for NIN, changed aoutput prov-key to :  ecoop_prov
added new methods to add metadata at notebook level, add prov for NIN, changed aoutput prov-key to :  ecoop_prov

epifanio/ecoop-1,epifanio/ecoop-1,tetherless-world/ecoop,tetherless-world/ecoop,tetherless-world/ecoop,epifanio/ecoop-1