add talkmap_link option

Author: staeiou

_config.yml

@@ -19,6 +19,7 @@ breadcrumbs              : false # true, false (default)
 words_per_minute         : 160
 future                   : true
 read_more                : "disabled" # if enabled, adds "Read more" links to excerpts
+talkmap_link             : false #change to true to add link to talkmap on talks page
 comments:
   provider               : # false (default), "disqus", "discourse", "facebook", "google-plus", "staticman", "custom"
   disqus: