Move template_header and change_template to twig

system/templates/forms.change_template.html.twig

@@ -0,0 +1,4 @@
+<form method="get" action="{{ constant('BASE_URL') }}">
+	<hidden name="subtopic" value="{{ constant('PAGE') }}"/>
+	<select name="template" onchange="this.form.submit()">{{ options|raw }}</select>
+</form>

system/templates/templates.header.html.twig

@@ -0,0 +1,21 @@
+<meta charset="{{ charset }}">
+<meta http-equiv="content-language" content="{{ config.language }}" />
+<meta http-equiv="content-type" content="text/html; charset={{ charset }}" />
+{% if not is_admin %}
+<base href="{{ constant('BASE_URL') }}" />
+<title>{{ title }}</title>
+{% endif %}
+<meta name="description" content="{{ config.meta_description }}" />
+<meta name="keywords" content="{{ config.meta_keywords }}, myaac, wodzaac" />
+<meta name="generator" content="MyAAC" />
+<link rel="stylesheet" type="text/css" href="{{ constant('BASE_URL') }}tools/css/messages.css" />
+<script type="text/javascript" src="{{ constant('BASE_URL') }}tools/js/jquery.min.js"></script>
+<noscript>
+	<div class="warning" style="text-align: center; font-size: 14px;">
+		Your browser does not support JavaScript or its disabled!<br/>
+		Please turn it on, or be aware that some features on this website will not work correctly.
+	</div>
+</noscript>
+{% if config.recaptcha_enabled %}
+<script src="https://www.google.com/recaptcha/api.js"></script>
+{% endif %}