update Spanish localization files

git-svn-id: https://plugins.svn.wordpress.org/youtube-channel/trunk@997551 b8457f37-d9ea-0310-8a92-e5e31aec5664
update Spanish translator name

git-svn-id: https://plugins.svn.wordpress.org/youtube-channel/trunk@997552 b8457f37-d9ea-0310-8a92-e5e31aec5664