'BeforeParserFetchFileAndTitle': before an image is rendered by Parser
$parser: Parser object
$nt: the image title
-&$time: the image timestamp (use '0' to force a broken thumbnail)
-&$sha1: image base 36 sha1 (used to specify the file, $nt will be ignored if this is set)
+&$options: array of options to RepoGroup::findFile
&$descQuery: query string to add to thumbnail URL
+If 'broken' is a key in $options then the file will appear as a broken thumbnail.
+
'BeforeParserFetchTemplateAndtitle': before a template is fetched by Parser
$parser: Parser object
$title: title of the template