updated changelog to reflect pipes removal.
updated changelog to reflect pipes removal.

germanviscuso/blueprints,tinkerpop/blueprints,iskytek/blueprints,dmargo/blueprints-seas,datablend/blueprints,wmudge/blueprints,echinopsii/net.echinopsii.3rdparty.blueprints,nish5887/blueprints,jwest-apigee/blueprints,orientechnologies/blueprints,maiklos-mirrors/tinkerpop_blueprints,joeyfreund/blueprints,qiangswa/blueprints