make a single instance of Parser per client

lib/client.js

@@ -40,9 +40,9 @@ p.connect = function() {
     fullBuffer.write(data,8);
     self.stream.write(fullBuffer);
   });
-
-  this.stream.on('data', function(data) {
-    var parser = new Parser(data);
+  var parser = new Parser();
+  this.stream.on('data', function(buffer) {
+    parser.setBuffer(buffer); 
     var msg = parser.parseMessage();
     while(msg) {
       self.emit('message', msg);

lib/parser.js

@@ -1,10 +1,14 @@
 var Parser = function(buffer) {
-  this.offset = 0;
-  this.buffer = buffer;
+ 
 };
 
 var p = Parser.prototype;
 
+p.setBuffer = function(buffer) {
+  this.buffer = buffer;
+  this.offset = 0;
+};
+
 p.parseMessage =  function() {
   if(this.buffer.length == this.offset) {
     return false;