Updated CHANGES file to include changes for gcf 1.5
Updated CHANGES file to include changes for gcf 1.5

ahelsing/geni-tools,ahelsing/geni-tools,tcmitchell/geni-tools,GENI-NSF/gram,GENI-NSF/gram,plantigrade/geni-tools,GENI-NSF/gram,tcmitchell/geni-tools,plantigrade/geni-tools