Partial fix of issue 55, addition of a simple Wiki.

Added a base wiki, it is now possible to create wiki pages and update
them. Revisions are kept also not used/displayed at the moment.

src/IDF/templates/idf/project/home.html

@@ -7,7 +7,7 @@
 </div>
 {/block}
 {block body}
-{$project.description|markdown}
+{markdown $project.description, $request}
 {/block}
 {block context}
 {if count($downloads) > 0}