* New: Plugin thumbnail that now appears in WP repo search
* Improvement: If an error occurs the widget will output them and then ensure that the bad result is not cached so if the user fixes the error they won't have to manually clear the cache.
* Minor improvements the the widget's frontend appearance
* Fixed bad links to plugin docs
* Tested WP 4.0 functionality to approve bumping version compatibility

git-svn-id: https://plugins.svn.wordpress.org/google-places-reviews/trunk@995577 b8457f37-d9ea-0310-8a92-e5e31aec5664