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/Assets.xcassets/MenuBarIconMac.imageset/Contents.json

@@ -0,0 +1,21 @@
+{
+  "images" : [
+    {
+      "idiom" : "mac",
+      "filename" : "MenuBarIconMac.png",
+      "scale" : "1x"
+    },
+    {
+      "idiom" : "mac",
+      "filename" : "MenuBarIconMac@2x.png",
+      "scale" : "2x"
+    }
+  ],
+  "info" : {
+    "version" : 1,
+    "author" : "xcode"
+  },
+  "properties" : {
+    "template-rendering-intent" : "template"
+  }
+}