Add tabletTest.js to test adding and removing buttons from tablet UI

scripts/developer/tests/tabletTest.js

@@ -0,0 +1,26 @@
+//
+//  tabletTest.js
+//
+//  Created by Anthony J. Thibault on 2016-12-15
+//  Copyright 2016 High Fidelity, Inc.
+//
+//  Distributed under the Apache License, Version 2.0.
+//  See the accompanying file LICENSE or http://www.apache.org/licenses/LICENSE-2.0.html
+//
+
+// Adds a BAM! button to the tablet ui.
+
+var tablet = Tablet.getTablet("com.highfidelity.interface.tablet.system");
+var button = tablet.addButton({
+    icon: "https://s3.amazonaws.com/hifi-public/tony/icons/hat-up.svg",
+    color: "#ff6f6f",
+    text: "BAM!!!"
+});
+
+button.clicked.connect(function () {
+    print("AJT: BAMM!!! CLICK from JS!");
+});
+
+Script.scriptEnding.connect(function () {
+    tablet.removeButton(button);
+});