fixed hierarchical filter issue and change icons

git-svn-id: https://plugins.svn.wordpress.org/taxonomy-filter/trunk@1026156 b8457f37-d9ea-0310-8a92-e5e31aec5664
review changelog and FAQ for version 1.0.1

git-svn-id: https://plugins.svn.wordpress.org/taxonomy-filter/trunk@1026158 b8457f37-d9ea-0310-8a92-e5e31aec5664