removed group of all taxonomies into one, order category and tag columns

git-svn-id: https://plugins.svn.wordpress.org/taxonomy-taxi/trunk@861169 b8457f37-d9ea-0310-8a92-e5e31aec5664
minor cleanup

git-svn-id: https://plugins.svn.wordpress.org/taxonomy-taxi/trunk@861175 b8457f37-d9ea-0310-8a92-e5e31aec5664
show terms with 0 count

git-svn-id: https://plugins.svn.wordpress.org/taxonomy-taxi/trunk@861176 b8457f37-d9ea-0310-8a92-e5e31aec5664
remove dbug

git-svn-id: https://plugins.svn.wordpress.org/taxonomy-taxi/trunk@861177 b8457f37-d9ea-0310-8a92-e5e31aec5664