Version 1.4 - add filters and actions, update README

git-svn-id: https://plugins.svn.wordpress.org/opensearchserver-search/trunk@1019510 b8457f37-d9ea-0310-8a92-e5e31aec5664
Version 1.4 - add filters and actions, update README

git-svn-id: https://plugins.svn.wordpress.org/opensearchserver-search/trunk@1019515 b8457f37-d9ea-0310-8a92-e5e31aec5664