People page layout, misc changes:

* Remove "About" heading
* Hide "Group Publications" heading if there are none
* Centre card on page when no main column content is available
* Remove duplication of title and names configuration
* Shunt role onto same line as title

_layouts/person.html

 ---
-layout: page
+layout: default
 menu: false
 ---
-<div class="row">
-  <div class="col-sm-12">
-    <h3 class="text-muted">{{ page.position }}</h3>
-  </div>
-</div>
-<div class="row">
-  <div class="col-sm-4">
-    <div class="card">
-      <img class="img-circle center-block" style="width: 60%; padding: 7pt" src="{{ page.image | prepend: site.baseurl }}" alt="Photo of {{ page.firstname }} {{ page.lastname }}" />
-      <div class="list-group list-group-flush">
-        {% if page.webpage %}<a class="list-group-item" href="{{ page.webpage }}"><i class="fa fa-fw fa-globe"></i>&nbsp; Webpage</a>{% endif %}
-        {% if page.email %}<a class="list-group-item" href="mailto:{{ page.email }}"><i class="fa fa-fw fa-envelope-o"></i>&nbsp; {{ page.email }}</a>{% endif %}
-        {% if page.twitter %}<a class="list-group-item" href="https://twitter.com/{{ page.twitter }}"><i class="fa fa-fw fa-twitter"></i>&nbsp; @{{ page.twitter }}</a>{% endif %}
-        {% if page.github %}<a class="list-group-item" href="https://github.com/{{ page.github }}"><i class="fa fa-fw fa-github"></i>&nbsp; GitHub Profile</a>{% endif %}
+<article class="post">
+  <header class="post-header">
+    <div class="row">
+      <div class="col-sm-12">
+        <h2 class="post-title">{{ page.firstname }} {{ page.lastname }}
+          <small class="text-muted">{{ page.position }}</small></h2>
       </div>
     </div>
-  </div>
-  <div class="col-sm-8">
-    <h3>About</h4>
-    {{ content }}
+  </header>
+
+{% comment %} Test that we have main content to show {% endcomment %}
+{% capture bibliography %}{% bibliography -q @*[author ~= {{ page.lastname }}] %}{% endcapture %}
+{% assign test_bib = bibliography | strip_html | strip_newlines %}
+{% assign test = test_bib | append: content | strip_html | strip_newlines %}
+{% if test == "" %}{% assign card-col-class = " col-md-offset-4" %}{% endif %}
+
+  <div class="post-content">
+    <div class="row">
+      <div class="col-sm-4{{card-col-class}}">
+        <div class="card">
+          <img class="img-circle center-block" style="width: 60%; padding: 7pt" src="{{ page.image | prepend: site.baseurl }}" alt="Photo of {{ page.firstname }} {{ page.lastname }}" />
+          <div class="list-group list-group-flush">
+            {% if page.webpage %}<a class="list-group-item" href="{{ page.webpage }}"><i class="fa fa-fw fa-globe"></i>&nbsp; Webpage</a>{% endif %}
+            {% if page.email %}<a class="list-group-item" href="mailto:{{ page.email }}"><i class="fa fa-fw fa-envelope-o"></i>&nbsp; {{ page.email }}</a>{% endif %}
+            {% if page.twitter %}<a class="list-group-item" href="https://twitter.com/{{ page.twitter }}"><i class="fa fa-fw fa-twitter"></i>&nbsp; @{{ page.twitter }}</a>{% endif %}
+            {% if page.github %}<a class="list-group-item" href="https://github.com/{{ page.github }}"><i class="fa fa-fw fa-github"></i>&nbsp; GitHub Profile</a>{% endif %}
+          </div>
+        </div>
+      </div>
 
-    <h3>Group Publications</h4>
-    {% bibliography -q @*[author ~= {{ page.lastname }}] %}
+      {% if test != "" %}
+      <div class="col-sm-8">
+        {{ content }}
+
+        {% if test_bib != "" %}
+        <h3>Group Publications</h3>
+        {{ bibliography }}
+        {% endif %}
+      </div>
+      {% endif %}
+
+    </div>
   </div>
-</div>
+</article>

_people/da-rocha-pinto.md

 ---
-title: Pedro da Rocha Pinto
 firstname: Pedro
 lastname: da Rocha Pinto
 image: /images/pedro.jpg

_people/gardner.md

 ---
-title: Philippa Gardner
 firstname: Philippa
 lastname: Gardner
 image: /images/gardner.jpg

_people/ntzik.md

 ---
-title: Gian Ntzik
 firstname: Gian
 lastname: Ntzik
 image: /images/gian.jpg

_people/raad.md

 ---
-title: Azalea Raad
 firstname: Azalea
 lastname: Raad
 image: /images/azalea.jpg

_people/sutherland.md

 ---
-title: Julian Sutherland
 firstname: Julian
 lastname: Sutherland
 image: /images/julian.jpg

_people/xiong.md

 ---
-title: Shale Xiong
 firstname: Shale
 lastname: Xiong
 image: /images/shale.jpg
 position: PhD Student
-webpage: 
+webpage: http://www.doc.ic.ac.uk/~sx14/
 email: shale.xiong14@imperial.ac.uk
 ---