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/wiki/index.html

@@ -0,0 +1,13 @@
+{extends "idf/wiki/base.html"}
+{block docclass}yui-t1{assign $inWiki=true}{/block}
+{block body}
+{$pages.render}
+{if !$user.isAnonymous()}
+{aurl 'url', 'IDF_Views_Wiki::create', array($project.shortname)}
+<p><a href="{$url}"><img style="vertical-align: text-bottom;" src="{media '/idf/img/add.png'}" alt="+" align="bottom" /></a> <a href="{$url}">{trans 'New Page'}</a></p>{/if}
+
+{/block}
+{block context}
+<p><strong>{trans 'Number of pages:'}</strong> {$pages.nb_items}</p>
+{/block}
+