improvement: urls for category can be now id and category names (instead
of only id)
improvement: added 2 indexes (#image_tag.tag_id and #tags.url_name)
improvement: identification, register, search pages automatically set focus
on first form input
improvement: focus, nofocus css class now valid for all forms
fix: category comment is tag stripped in category_subcats.inc.php
(otherwise issues with html/scripts inside category comment)
git-svn-id: http://piwigo.org/svn/trunk@1131 68402e56-0260-453c-a942-63ccdbb3a9ee
