added support for latency

git-svn-id: https://plugins.svn.wordpress.org/site-search-analytics-by-measured-search/trunk@748049 b8457f37-d9ea-0310-8a92-e5e31aec5664
added support for latency

git-svn-id: https://plugins.svn.wordpress.org/site-search-analytics-by-measured-search/trunk@748051 b8457f37-d9ea-0310-8a92-e5e31aec5664