Set default delimiter to none.

Author: thorikawa

example/index.js

@@ -19,6 +19,7 @@ device
     bluetooth.connect(address, channel, function(err, connection){
       if(err) return console.error(err);
 
+      connection.delimiter = Buffer.from('\n', 'utf8');
       connection.on('data', (buffer) => {
         console.log('received message:', buffer.toString());
       });

index.js

@@ -19,7 +19,6 @@ function Connection(port, address){
   this.port    = port;
   this.address = address;
   this.buffer = new Buffer(0);
-  this.delimiter = Buffer.from('\n', 'utf8');
   const read = function () {
     process.nextTick(function() {
       if (self.isOpen()) {