Add bêta version to versions when it is available

_layouts/version.html

@@ -13,7 +13,7 @@ css: version
       <div class="defaultPage versionsPage pages textLeft" id="content" role="main">
         <div class="wrap">
           
-          <h3>Frama-C v{{ page.number }} {{ page.name }}</h3>
+          <h3>Frama-C v{{ page.number }} {{ page.name }}{% if page.beta %} [Bêta] {% endif %}</h3>
 					<div class="navigate-versions">
 						<div class="navigate-versions-button">
 							{% if page.previous %}

html/framac-versions.html

----
-layout: default
-title: Versions Frama-C
+---
+layout: default
+title: Versions Frama-C
 ---
 
   <div id="wrapper" class="hfeed">
@@ -17,16 +17,18 @@ title: Versions Frama-C
               plug-in Jessie.</p>
             </div>
 
-            <ul class="arrowList versionsList">
-			  {% for version in site.fc-versions reversed %}
+            <ul class="arrowList versionsList">
+        {% for version in site.fc-versions reversed %}
+            {% unless version.beta %}
               <li>
                 <a href="{{ version.url }}">Frama-C v{{ version.number }} {{ version.name }}</a>
               </li>
+            {% endunless %}
 			  {% endfor %}
             </ul>
           </div>
         </div>
-      </div>
+      </div>
 	  {% include footer.html %}
 
       <div class="clear"></div>

html/get-frama-c.html

@@ -19,7 +19,12 @@ title: Get Frama-C
             <a href="#" role="button" class="tab-up tab-up-linux" onClick="clickTab('linux')"><b>Linux</b></a> <a href="#" role="button" class="tab-up tab-up-mac" onClick="clickTab('mac')"><b>Mac</b></a> <a href="#" role="button" class="tab-up tab-up-windows" onClick="clickTab('windows')"><b>Windows (WSL)</b></a>
           </div>
 		  <br>
-		  <a href="/html/framac-versions.html" class="previousVersion">Previous Versions</a>
+      <a href="/html/framac-versions.html" class="previousVersion">Previous Versions</a>
+      {% for version in site.fc-versions %}
+          {% if version.beta %}
+            - <a href="{{ version.url }}" class="previousVersion">Bêta Version</a>
+          {% endif %}
+      {% endfor %}
           <div class="notebook code">
             <div>
               <div class="codeScreen">