adds peter and twitter links for authors

_data/authors.yml

@@ -9,6 +9,7 @@ amiller:
 
 zcashboard:
   name: Zcash Foundation
+  twitter: ZcashFoundation
   
 acityinohio:
   name: Josh Cincinnati 
@@ -22,4 +23,11 @@ jonathas-paige:
   web: https://z.cash
   email:
   bio: ""
-  twitter: zcashco
+  twitter: zcashco
+
+petervv:
+  name: Peter Van Valkenburgh
+  web: http://www.petervv.com/
+  email:
+  bio: ""
+  twitter: valkenburgh

_layouts/post.html

@@ -34,7 +34,7 @@
         {% elsif author.avatar %}
           <img src="{{ site.url }}/images/{{ author.avatar }}" class="bio-photo" alt="{{ author.name }} bio photo"></a>
         {% endif %}
-        <span class="author vcard">By <span class="fn">{{ author.name }}</span></span>
+        <span class="author vcard">By <span class="fn"><a href="https://twitter.com/@{{ author.twitter }}">{{ author.name }}</a></span></span>
         <span class="entry-date date published"><time datetime="{{ page.date | date_to_xmlschema }}"><i class="fa fa-calendar-o"></i> {{ page.date | date: "%B %d, %Y" }}</time></span>
         {% if page.modified %}<span class="entry-date date modified"><time datetime="{{ page.modified }}"><i class="fa fa-pencil"></i> {{ page.modified | date: "%B %d, %Y" }}</time></span>{% endif %}
         {% if site.owner.disqus-shortname and page.comments or site.comments %}<span class="entry-comments"><i class="fa fa-comment-o"></i> <a href="#disqus_thread">Comment</a></span>{% endif %}