Add basic framework for web based repository access

/p/$project/source/repo/ is assigned to a method that
takes care of providing repository access.
For now, this results in an exception on all SCMs.

src/IDF/conf/urls.php

@@ -245,6 +245,11 @@ $ctl[] = array('regex' => '#^/p/([\-\w]+)/source/changesrev/$#',
                'model' => 'IDF_Views_Source_Svn',
                'method' => 'changelogRev');
 
+$ctl[] = array('regex' => '#^/p/([\-\w]+)/source/repo/(.*)$#',
+               'base' => $base,
+               'model' => 'IDF_Views_Source',
+               'method' => 'repository');
+
 // ---------- WIKI -----------------------------------------
 
 $ctl[] = array('regex' => '#^/p/([\-\w]+)/doc/$#',