Tests externally embedding a userscript in the page to trigger an install. See https://github.com/cletusc/Userscript--Twitch-Chat-Emotes/issues/52

script.user.js

// ==UserScript==
// @name        Embedding Twitch Chat Emotes as userscript
// @namespace   #Cletus
// @description Tests externally embedding a userscript in the page to trigger an install. See https://github.com/cletusc/Userscript--Twitch-Chat-Emotes/issues/52
// @include     http://*.twitch.tv/*
// @version     1
// @grant       none
// ==/UserScript==

var script = document.createElement('script');
script.type = 'text/javascript';
script.src = 'https://rawgit.com/cletusc/Userscript--Twitch-Chat-Emotes/master/script.user.js';
var head = document.querySelector('head');
if (head) {
	head.appendChild(script);
	console.log('Appended script--did it trigger an install?')
}
else {
	console.error('Could not find `head`.');
}