Moved mustache partials to separate directory.

templates/index_html.mustache

@@ -201,6 +201,7 @@
             Hello, world!
 </p>
 
+{{> mdl_content_foot}}
 {{> mdl_foot}}
 <a href="https://github.com/google/material-design-lite/blob/master/templates/article/" target="_blank" id="view-source" class="mdl-button mdl-js-button mdl-button--raised mdl-js-ripple-effect mdl-color--accent mdl-color-text--accent-contrast">View Source</a>
 {{> html_foot}}

templates/partials/mdl_content_foot.mustache

@@ -9,5 +9,3 @@
         </ul>
       </div>
     </footer>
-  </main>
-</div>

templates/partials/mdl_content_head.mustache

@@ -1,4 +1,3 @@
-  <main class="frs-main mdl-layout__content">
     <div class="frs-container mdl-grid">
       <div class="mdl-cell mdl-cell--2-col mdl-cell--hide-tablet mdl-cell--hide-phone"></div>
       <div class="frs-content mdl-color--white mdl-shadow--4dp content mdl-color-text--grey-800 mdl-cell mdl-cell--8-col">

templates/partials/mdl_foot.mustache

@@ -0,0 +1,2 @@
+  </main>
+</div>

templates/partials/mdl_head.mustache

@@ -5,3 +5,4 @@
     </div>
   </header>
   <div class="frs-ribbon"></div>
+  <main class="frs-main mdl-layout__content">