add (mostly empty) LULESH page

Author: tmcdonell

examples/lulesh.html

@@ -59,6 +59,9 @@
           </div>
                 <div class="container">
                     <h1 id="lulesh">LULESH</h1>
+<p>This example implements the Livermore Unstructured Lagrangian Explicit Shock Hydrodynamics (<a href="https://codesign.llnl.gov/lulesh.php">LULESH</a>) application. This shock hydrodynamics problem was originally defined and implemented by Lawrence Livermore National Laboratory as one of the five challenge problem in the <a href="http://www.darpa.mil/Our_Work/MTO/Programs/Ubiquitous_High_Performance_Computing_%28UHPC%29.aspx">DARPA UHPC program</a> and has become a widely studied proxy application.</p>
+<p>LULESH represents a typical hydrodynamics code such as <a href="https://wci.llnl.gov/simulation/computer-codes/ale3d">ALE3D</a>, but is a highly simplified application, hard-coded to solve the Sedov blast problem on an unstructured hexahedron mesh.</p>
+<p><img class="img-responsive center-block" src="/media/lulesh/ale3d.gif" alt="What LULESH models"></p>
                   </div>
       </div>
     </div>

index.html

@@ -121,8 +121,8 @@ <h2 class="featurette-heading">
         </div>
         <div class="col-md-5 col-md-pull-7">
           <div class="embed-responsive embed-responsive-1by1">
-            <video controls class="embed-responsive-item" poster="/media/lulesh.jpg">
-              <source src="/media/lulesh.mp4" type="video/mp4">
+            <video controls class="embed-responsive-item" poster="/media/lulesh/lulesh.jpg">
+              <source src="/media/lulesh/lulesh.mp4" type="video/mp4">
             </video>
           </div>
           <p class="text-center text-muted">

md/examples/lulesh.md

@@ -5,3 +5,15 @@ nav-examples: True
 
 # LULESH
 
+This example implements the Livermore Unstructured Lagrangian Explicit Shock
+Hydrodynamics ([LULESH](https://codesign.llnl.gov/lulesh.php)) application. This
+shock hydrodynamics problem was originally defined and implemented by Lawrence
+Livermore National Laboratory as one of the five challenge problem in the [DARPA
+UHPC program](http://www.darpa.mil/Our_Work/MTO/Programs/Ubiquitous_High_Performance_Computing_%28UHPC%29.aspx) and has become a widely studied proxy application.
+
+LULESH represents a typical hydrodynamics code such as [ALE3D](https://wci.llnl.gov/simulation/computer-codes/ale3d), but is a highly
+simplified application, hard-coded to solve the Sedov blast problem on an
+unstructured hexahedron mesh.
+
+<img class="img-responsive center-block" src="/media/lulesh/ale3d.gif" alt="What LULESH models">
+