Prepped Readme for new version release.  Added License.

git-svn-id: https://plugins.svn.wordpress.org/flexible-posts-widget/trunk@885454 b8457f37-d9ea-0310-8a92-e5e31aec5664
Ignored additional files related to git.

git-svn-id: https://plugins.svn.wordpress.org/flexible-posts-widget/trunk@885455 b8457f37-d9ea-0310-8a92-e5e31aec5664