Load templates in prep.py instead of old pages

template/events-en.html

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+<h1>Events</h1>
+<p>
+  Following list contains all forthcoming events. Held events are listed in
+  <a href="/en/events_archive">archive</a>.
+</p>
+<br />
+<p>We also provide <a href="https://dmz.rs/events.ical">ical file</a></p>
+<br />