new look to front page

Author: simongravelle

docs/avatars/level1/bulk-solution/bulk-solution-gromacs.png

@@ -31,7 +31,7 @@ <h2>
                     <section class="tiles">
                         <article class="style1">
                             <span class="image">
-                                <img src="sphinx/source/tutorials/figures/level1/bulk-solution/avatar-gromacs.png" alt="gromacs tutorial logo" />
+                                <img src="avatars/level1/bulk-solution/bulk-solution-gromacs.png" alt="gromacs tutorial logo" />
                             </span>
                             <a href="sphinx/build/html/tutorials/level1/bulk-solution.html">
                                 <div class="content">
@@ -43,12 +43,12 @@ <h2>
                         </article>
                         <article class="style1">
                             <span class="image">
-                                <img src="sphinx/source/tutorials/figures/level2/stretching-a-polymer/avatar.png" alt="gromacs tutorial logo" />
+                                <img src="avatars/level1/protein-in-electrolyte/protein-in-electrolyte.png" alt="gromacs tutorial logo" />
                             </span>
-                            <a href="sphinx/build/html/tutorials/level2/stretching-a-polymer.html">
+                            <a href="sphinx/build/html/tutorials/level1/protein-in-electrolyte.html">
                                 <div class="content">
                                     <p align="left">
-                                        Pulling a <b>polymer in water</b>
+                                        Simulating a <b>protein</b> in an electrolyte
                                     </p>
                                 </div>
                             </a>