function binaryAgent(str) {
  var splitStr = str.split(" ");
  var newVar = splitStr.map(function(val) {
    return String.fromCharCode(parseInt(val,2).toString(10));
  });
  str = newVar.join("");
  return str;
}

binaryAgent("01000001 01110010 01100101 01101110 00100111 01110100 00100000 01100010 01101111 01101110 01100110 01101001 01110010 01100101 01110011 00100000 01100110 01110101 01101110 00100001 00111111"); // should return "Aren't bonfires fun!?"