* Added ID field.
* Fixed button colour with themes that define a visited link color.
* Improved styling with the icon.
* Updated to latest widget framework which has a way to deselect icon.

git-svn-id: https://plugins.svn.wordpress.org/so-button-widget/trunk@920395 b8457f37-d9ea-0310-8a92-e5e31aec5664