Fix HTML article inclusion

Fix draft inclusion in preview
Enhance cache post content (avoid recomputing md5sum if present)
Add generation duration time
Add post only generation (for Dev)
Remove Draft when it becomes Post
Update blog Copyright
Update TinyMCE plugins for inclusion
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dynastie/templates/view_blog.html

@@ -23,7 +23,7 @@
 <b>Drafts</b>
 <table>
 {% for draft in drafts %}
-    <tr><td><a href="/draft/edit/{{ draft.id }}">{{ draft.id }}</a></td><td>{{ draft.title }}</td><td>{{ draft.creation_date }}</td><td>{{ draft.modification_date }}</td><td><a href="/draft/delete/{{ draft.id }}" onclick="return confirm('Do you really want to delete this item ?')">Delete</a></td></tr>
+    <tr><td><a href="/draft/edit/{{ draft.id }}">{{ draft.id }}</a></td><td>{{ draft.title }}</td><td>{{ draft.category.name }}</td><td>{{ draft.creation_date }}</td><td>{{ draft.modification_date }}</td><td><a href="/draft/delete/{{ draft.id }}" onclick="return confirm('Do you really want to delete this item ?')">Delete</a></td></tr>
 {% endfor %}
 </table><br/>
 {% endif %}