Adding v6.0.1 and more clear article ref

Author: fpalacios

index.html

@@ -5,7 +5,7 @@
 <div class="header-container jumbotron">
     <div class="container">   <!--- style="background-color:white" --->
       <right>
-      <h1>SU2 v6.0 Falcon</h1>   <!--  style="color:black" -->
+      <h1>SU2 v6.0.1 Falcon</h1>   <!--  style="color:black" -->
       <h2>Powerful. Fast. Free.</h2>
       <p><a class="btn btn-info btn-lg" href="{{ "/download.html" | prepend: site.baseurl }}" role="button">
         Download</a></p>
@@ -23,7 +23,7 @@ <h2 class="header-light regular-pad">What is SU2?</h2>
             <blockquote>
               <p>SU2 is an open-source collection of software tools written in C++ and Python for the analysis of partial differential equations (PDEs) and PDE-constrained optimization problems on unstructured meshes with state-of-the-art numerical methods. SU2 is a leading technology for adjoint-based optimization. Through the initiative of users and developers around the world, SU2 is now a well established tool in the computational sciences with wide applicability to aeronautical, automotive, naval, and renewable energy industries, to name a few.</p>
 
-
+              <p>Find a detailed description of the code philosophy, components, and implementations in the SU2 <a href="https://arc.aiaa.org/doi/abs/10.2514/1.J053813">AIAA Journal article</a>. Whether it's <a href="documents/AIAA-2016-3518.pdf">discrete adjoints</a>, <a href="documents/2017_J._Phys.3A_Conf._Ser._821_012013.pdf">non-ideal compressible CFD</a>, or <a href="http://dx.doi.org/10.1016/j.compfluid.2016.02.003">high-performance computing</a>, SU2 has something for you.</p>
             </blockquote>
         </div>
         <div class="col-md-6 text-center">