- plugins admin menu appear now in the admin page menubar

- plugins are loaded immediately after loading the config (allow 
them to hack more of pwg like user init, template init etc...)
- trigger event format_exif_data (for picture display only)

git-svn-id: http://piwigo.org/svn/trunk@1655 68402e56-0260-453c-a942-63ccdbb3a9ee

include/picture_metadata.inc.php

@@ -41,6 +41,7 @@ if ($conf['show_exif'])
 
   if ($exif = @read_exif_data($picture['current']['image_path']))
   {
+    $exif = trigger_event('format_exif_data', $exif, $picture['current'] );
     $template->assign_block_vars(
       'metadata.headline',
       array('TITLE' => 'EXIF Metadata')