Initial start of the menu bar app.

Has menu items to join/leave networks which currently displays an empty popover from the icon (icon needs to be made still)

ZeroTier One/ShowNetworksViewController.swift

@@ -0,0 +1,18 @@
+//
+//  ShowNetworksViewController.swift
+//  ZeroTier One
+//
+//  Created by Grant Limberg on 5/14/16.
+//  Copyright © 2016 ZeroTier, Inc. All rights reserved.
+//
+
+import Cocoa
+
+class ShowNetworksViewController: NSViewController {
+
+    override func viewDidLoad() {
+        super.viewDidLoad()
+        // Do view setup here.
+    }
+    
+}