Updated reCAPTCHA v2 to use api.js method

templates/header.html

@@ -17,7 +17,8 @@
 			{% for javascript in config.additional_javascript %}<script type="text/javascript" src="{{ config.additional_javascript_url }}{{ javascript }}"></script>{% endfor %}
 			{% endif %}
 		{% endif %}
-		{% if config.recaptcha %}<style type="text/css">{% raw %}
+		{% if config.recaptcha %}<script src="//www.google.com/recaptcha/api.js"></script>
+		<style type="text/css">{% raw %}
 			#recaptcha_area {
 				float: none !important;
 				padding: 0 !important;

templates/post_form.html

@@ -74,7 +74,7 @@
 				{{ antibot.html() }}
 			</th>
 			<td>
-				<script type="text/javascript" src="//www.google.com/recaptcha/api/challenge?k={{ config.recaptcha_public }}"></script>
+				<div class="g-recaptcha" data-sitekey="{{ config.recaptcha_public }}"></div>
 				{{ antibot.html() }}
 			</td>
 		</tr>