Fix stylesheet minification

MyBB attempts to fetch cached stylesheets and put them back in the database. Kill this functionality and let cache files live in peace.
Update spiders/bots list
Link to contact.php

Link to contact.php on installation instead of using the not-so-useful mailto URI scheme.
Give contact.php a breadcrumb
Add breadcrumb to Member List Advanced Search
Add breadcrumb to Member List Advanced Search
Fix relative time issue with printthread.php