added initial tapermonkey script and readme

README.md

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+# GatherTownToggle
+
+A tapermonkey script to toggle microphone and camera with just a key press. 
+
+Press "m" to toggle your microphone.
+Press "c" to toggle your camera.
+
+That's it!

tapermonkeyScript.js

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+// ==UserScript==
+// @name         gather.town microphone and camera toggle
+// @namespace    https://schoenenborn.info/
+// @version      1.0.0
+// @description  A script which adds the possibility to toggle your camera and microphone with a simple key press
+// @author       Daniel Schönenborn
+// @match        https://gather.town/app/*
+// @icon         https://www.google.com/s2/favicons?domain=gather.town
+// @grant        none
+// ==/UserScript==
+
+(function () {
+    'use strict';
+
+    document.addEventListener("keydown", function (keydownEvent) {
+        if (keydownEvent.code === "KeyM") {
+            let microphoneToggleButton = document.querySelector('[title="Enable microphone"]');
+
+            if (microphoneToggleButton === null) {
+                microphoneToggleButton = document.querySelector('[title="Disable microphone"]');
+            }
+
+            microphoneToggleButton.click();
+            return;
+        }
+
+        if (keydownEvent.code === "KeyC") {
+            let cameraToggleButton = document.querySelector('[title="Enable video"]');
+
+            if (cameraToggleButton === null) {
+                cameraToggleButton = document.querySelector('[title="Disable video"]');
+            }
+
+            cameraToggleButton.click();
+            return;
+        }
+    });
+})();