adjust README to simplified API
adjust README to simplified API

SpirentOrion/AutobahnJS,robertkraig/AutobahnJS,oberstet/autobahn-js,tavendo/AutobahnJS,oberstet/autobahn-js,goeddea/autobahn-js,bigmeech/AutobahnJS,miracle2k/AutobahnJS,crossbario/autobahn-js,tavendo/AutobahnJS,RyanHope/AutobahnJS,oberstet/autobahn-js,svvac/AutobahnJS,r2fresh/AutobahnJS,Dynalon/autobahn-ts,markope/AutobahnJS,Dynalon/autobahn-js,cantidio/autobahn-js,crossbario/autobahn-js,cantidio/autobahn-js,Dynalon/autobahn-js,Dynalon/autobahn-ts,oberstet/autobahn-js,cantidio/autobahn-js,ewollesen/AutobahnJS,bigmeech/AutobahnJS,goeddea/autobahn-js,crossbario/autobahn-js,mykwillis/wamp-tessel,r2fresh/AutobahnJS,Aomitayo/AutobahnJS,bigmeech/AutobahnJS,Dynalon/autobahn-js,tavendo/AutobahnJS,crossbario/autobahn-js,svvac/AutobahnJS,goeddea/autobahn-js,Dynalon/autobahn-ts,SpirentOrion/AutobahnJS,Dynalon/autobahn-js,svvac/AutobahnJS,Dynalon/autobahn-ts