Donate button added to the Settings page


git-svn-id: https://plugins.svn.wordpress.org/yet-another-weather-plugin/trunk@888459 b8457f37-d9ea-0310-8a92-e5e31aec5664
Changelog updated


git-svn-id: https://plugins.svn.wordpress.org/yet-another-weather-plugin/trunk@888461 b8457f37-d9ea-0310-8a92-e5e31aec5664