Update Readme to document popup opt-in for share links
Update Readme to document popup opt-in for share links

Renji/rrssb,kushiahu/rrssb,KM-MFG/rrssb,smokymountains/rrssb,landsurveyorsunited/rrssb,AdamPS/rrssb-plus,KM-MFG/rrssb,gurprit/rrssb,EagerApps/rrssb,brianjking/rrssb,gurprit/rrssb,kushiahu/rrssb,kni-labs/rrssb,kni-labs/rrssb,naimteehee/rrssb,reatlat/rrssb,smokymountains/rrssb,Renji/rrssb,reatlat/rrssb,landsurveyorsunited/rrssb,janusnic/rrssb,brianjking/rrssb,AdamPS/rrssb-plus,naimteehee/rrssb,janusnic/rrssb,EagerApps/rrssb