Added info about setting up virtualenv and example call to the cumulusci command
Added info about setting up virtualenv and example call to the cumulusci
command

Joble/CumulusCI,SalesforceFoundation/CumulusCI,e02d96ec16/CumulusCI,cdcarter/CumulusCI,e02d96ec16/CumulusCI,SalesforceFoundation/CumulusCI