Removed reference to google group and replaced it with a link to stackoverflow
Removed reference to google group and replaced it with a link to stackoverflow

jpo/healthcareai-py,mxlei01/healthcareai-py,jpo/healthcareai-py,HealthCatalystSLC/healthcareai-py,HealthCatalystSLC/healthcareai-py,HealthCatalyst/healthcareai-py,mxlei01/healthcareai-py,HealthCatalyst/healthcareai-py