add uid to post template

event_template.md

@@ -7,6 +7,7 @@ event_begin: "{{ event.begin }}"
 event_end: "{{ event.end }}"
 duration: "{{ event.duration }}"
 localized_begin: "{{ event.localized_begin }}"
+uid: "{{ event.uid }}"
 {% if event.location %}
 location: "{{ event.location }}"
 {% endif %}