Merge pull request #5 from cubedro/develop

changed chain watch to changed

lib/node.js

@@ -344,7 +344,7 @@ Node.prototype.setWatches = function()
 	});
 
 	this.chainWatch = web3.eth.watch('chain');
-	this.chainWatch.messages(function(log) {
+	this.chainWatch.changed(function(log) {
 		console.log('block changed');
 		self.update();
 	});