Includes translation files for Spanish

git-svn-id: https://plugins.svn.wordpress.org/search-index-page-content/trunk@1043788 b8457f37-d9ea-0310-8a92-e5e31aec5664
updated to version 1.4

git-svn-id: https://plugins.svn.wordpress.org/search-index-page-content/trunk@1043789 b8457f37-d9ea-0310-8a92-e5e31aec5664