Convert to ES5, add web server

* No compilation step
 * Beginnings of web interface
 * Simple express server; React-based frontend
 * CommonJS style across codebase; auto-converts to RequireJS for browser
 * Using diffsync for realtime UI
 * "Provider" -> "Plugin"
 * Plugins expose one or more Providers

public/js/notifications.jsx

@@ -0,0 +1,19 @@
+
+module.exports.NotificationCenter = React.createClass({
+  render: function() {
+    
+    var notifications = this.props.notifications;
+    
+    if (!notifications || notifications.length == 0) return (
+      <div style={{color:"#999"}}>No Notifications</div>
+    )
+    
+    return (
+      <div>
+        { notifications.map(function(notification, index) {
+          return <div key={index}>{notification.message}</div>;
+        }) }
+      </div>
+    );
+  }
+});