- Fix bugs with clean query special characters
- Change display for Query settings section (add fieldsets)
- Add some test for empty facet
- Add some CSS for admin section
- Change way of indexing tags and categories: make use of the ability to provide an array to "$document->newField()"
- Change some texts and HTML

git-svn-id: https://plugins.svn.wordpress.org/opensearchserver-search/trunk@885518 b8457f37-d9ea-0310-8a92-e5e31aec5664