Added Sloval translate files

git-svn-id: https://plugins.svn.wordpress.org/wp-glossary/trunk@816518 b8457f37-d9ea-0310-8a92-e5e31aec5664
Add lang files

git-svn-id: https://plugins.svn.wordpress.org/wp-glossary/trunk@816520 b8457f37-d9ea-0310-8a92-e5e31aec5664