Spanish and Serbian translations by Ogi Djuraskovic firstsiteguide.com

git-svn-id: https://plugins.svn.wordpress.org/pwebonedrive/trunk@900202 b8457f37-d9ea-0310-8a92-e5e31aec5664
Changelog updated

git-svn-id: https://plugins.svn.wordpress.org/pwebonedrive/trunk@900205 b8457f37-d9ea-0310-8a92-e5e31aec5664