langpacks/slovak: plugin description translations by Ján Tinák (from wiki)

git-svn-id: http://svn.miranda-ng.org/main/trunk@9003 1316c22d-e87f-b044-9b9b-93d7a3e3ba9c
Czech langpack: update

git-svn-id: http://svn.miranda-ng.org/main/trunk@9004 1316c22d-e87f-b044-9b9b-93d7a3e3ba9c