update README for ol3
update README for ol3

Ecotrust/marineplanner-core,Ecotrust/marineplanner-core,MidAtlanticPortal/marco-portal2,Ecotrust/marineplanner-core,MidAtlanticPortal/marco-portal2,Ecotrust/marineplanner-core,MidAtlanticPortal/marco-portal2,MidAtlanticPortal/marco-portal2,Ecotrust/marineplanner-core