added method sendPromise

using promises instead of callbacks
	var action = new namiLib.Actions.SipPeers();
	nami.sendPromise(action)
	.then(function(data){
		data.events.forEach(function(item){
			if (item.event === 'PeerEntry') {
			//console.log(item.objectname);
			};
		});
	})
	.fail( function(data){ 
		console.log('Error')
	});