Update README for new build targets
Update README for new build targets

jarkos88/Cumulus1,cdcarter/Cumulus,InspectorSpacetime/Cumulus,cyberjus/Cumulus,ehrenfoss/Cumulus,abeyer/Cumulus,cyberjus/Cumulus,SalesforceFoundation/Cumulus,BillFlorioSFDC/Cumulus,jlantz/Cumulus,SalesforceFoundation/Cumulus,jlantz/Cumulus,SalesforceFoundation/Cumulus,abeyer/Cumulus,SalesforceFoundation/Cumulus,Zosoled/Cumulus,BillFlorioSFDC/Cumulus,cdcarter/Cumulus,BillFlorioSFDC/Cumulus,jlantz/Cumulus,jarkos88/Cumulus1,abeyer/Cumulus,cyberjus/Cumulus,InspectorSpacetime/Cumulus,jlantz/Cumulus,cdcarter/Cumulus,BillFlorioSFDC/Cumulus,Zosoled/Cumulus,abeyer/Cumulus,jarkos88/Cumulus1,Zosoled/Cumulus,cyberjus/Cumulus,ehrenfoss/Cumulus,cdcarter/Cumulus,InspectorSpacetime/Cumulus,ehrenfoss/Cumulus,InspectorSpacetime/Cumulus,Zosoled/Cumulus