Update text on home page, now no longer staff candidate

Pictures pretty out of date now though, and should prolly add more content to the index

index.html

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-title: Peter Heywood
+title: Dr Peter Heywood
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 <section id="about" class="content">
     <h2 class="sub-header">About</h2>
     <p>
-        I'm <strong>Peter Heywood</strong>, A Research Software Engineer in the <a href="//rse.shef.ac.uk">RSES Group</a> at the University of Sheffield; and a staff PhD Candidate in the <a href="https://www.shef.ac.uk/dcs/research/groups/visual-computing">Visual Computing research group</a> of the <a href="http://www.sheffield.ac.uk/dcs">Department of Computer Science</a> at <a href="http://shef.ac.uk/dcs/">the University of Sheffield</a>, working under the supervision of <a href="http://www.paulrichmond.staff.shef.ac.uk/">Dr Paul Richmond</a> and <a href="http://staffwww.dcs.shef.ac.uk/people/S.Maddock/">Dr Steve Maddock</a>.
+        I'm <strong>Peter Heywood</strong>, A Research Software Engineer in the <a href="//rse.shef.ac.uk">RSES Group</a> at <a href="http://shef.ac.uk/dcs/">the University of Sheffield</a>, mostly working on GPU & HPC related projects.
     </p>
-
-    <p>
-      My research is focussed on improving the run-time performance of road network simulation using many-core architectures, such as Graphics Processing Units (GPUs).
-    </p>
-
-
+
     <img src="{{ site.baseurl }}img/ptheywood-mugshot-256x256.jpg" />
 </section>