Added Russian translation and some modifications to Estonian and Spanish translations

git-svn-id: https://plugins.svn.wordpress.org/clean-and-simple-contact-form-by-meg-nicholas/trunk@772311 b8457f37-d9ea-0310-8a92-e5e31aec5664
tagging 4.1.8

git-svn-id: https://plugins.svn.wordpress.org/clean-and-simple-contact-form-by-meg-nicholas/trunk@772314 b8457f37-d9ea-0310-8a92-e5e31aec5664