add conditional for talkmap

Author: staeiou

_pages/talks.html

@@ -5,8 +5,12 @@
 author_profile: true
 ---
 
+{% if site.talkmap_link == true %}
+
 <p style="text-decoration:underline;"><a href="/talkmap.html">See a map of all the places I've given a talk!</a></p>
 
+{% endif %}
+
 {% for post in site.talks reversed %}
   {% include archive-single-talk.html %}
 {% endfor %}