examples: Added simulation scenario with MPI support

docs: Update documentation to include instructions
for MPI support and scenario executed in parallel

Change-Id: I5235462cad6f01751bcd5141b2c3e14585d5baa3
Refs: #2504
diff --git a/docs/source/_templates/indexcontent.html b/docs/source/_templates/indexcontent.html
index 67f376e..72634b2 100644
--- a/docs/source/_templates/indexcontent.html
+++ b/docs/source/_templates/indexcontent.html
@@ -32,7 +32,7 @@
            <p class="biglink"><a class="biglink" href="{{ pathto("cs") }}">Content Store</a><br/>
              <span class="linkdescr">several different build-in content store implementations: LRU, LFU, and others</span></p>
            <p class="biglink"><a class="biglink" href="{{ pathto("fw") }}">Forwarding Strategies</a><br/>
-             <span class="linkdescr">experimenting with differnet build-in and custom Interest/Data forwarding strategies</span></p>
+             <span class="linkdescr">experimenting with different build-in and custom Interest/Data forwarding strategies</span></p>
            <p class="biglink"><a class="biglink" href="{{ pathto("applications") }}">ndnSIM applications</a><br/>
              <span class="linkdescr">reference applications for network-leverl evaluations</span></p>
            <p class="biglink"><a class="biglink" href="{{ pathto("metric") }}">Obtaining metrics</a><br/>
@@ -48,6 +48,8 @@
          <span class="linkdescr">doxygen-generated API documentation</span></p>
       <p class="biglink"><a class="biglink" href="{{ pathto("faq") }}">FAQs</a><br/>
          <span class="linkdescr">frequently asked questions (with answers!)</span></p>
+      <p class="biglink"><a class="biglink" href="{{ pathto("parallel-simulations") }}">How to use OpenMPI</a><br/>
+         <span class="linkdescr">speeding up simulations by using OpenMPI for parallel execution of scenarios</span></p>
       <p class="biglink"><a class="biglink" href="{{ pathto("ndnsim-research-papers") }}">ndnSIM research papers</a><br/>
          <span class="linkdescr">list of ndnSIM-related papers</span></p>
     </td></tr>