Added Russian translation.

git-svn-id: https://plugins.svn.wordpress.org/flexible-posts-widget/trunk@885442 b8457f37-d9ea-0310-8a92-e5e31aec5664
Refactored widget PHP Class, adjusted JavaScript enqueue to better fit WordPress standards. Applied JSHinting to JavaScript. Minified JS for production.

git-svn-id: https://plugins.svn.wordpress.org/flexible-posts-widget/trunk@885443 b8457f37-d9ea-0310-8a92-e5e31aec5664
Prepped Readme for new version release.

git-svn-id: https://plugins.svn.wordpress.org/flexible-posts-widget/trunk@885444 b8457f37-d9ea-0310-8a92-e5e31aec5664