Fix styles for error pages

[scabbiaza]

What to do with different modes: dev vs prod

{% block styles %}
+    <link href="http://localhost:2992/public/bundle.css" rel="stylesheet"/>
+    <!--<link href="/public/bundle.css?{{ hashes.bundleCss }}" rel="stylesheet"/> -->
+    <link href='http://fonts.googleapis.com/css?family=Roboto+Condensed:400,300|Roboto+Slab:400' rel='stylesheet' type='text/css'>
+  {% endblock %}