Clean up of several issues

#1 : Add OpenWhisk (Cloud-Functions) support
#2 : Consistent naming in output
#9 : change bashrc handing, to ensure loading from bash_profile if exists
#17 : Update Slack invite URLs
#16 : Add git and docker setup for Ubuntu
#18: MacOS - Install brew if not present

• a few other minor enhancements
• Readme file updates