Changed the way the base url will be read, Reseted the widget form with to default

git-svn-id: https://plugins.svn.wordpress.org/hierarchical-navigation-widget/trunk@823113 b8457f37-d9ea-0310-8a92-e5e31aec5664
forgot to update the readme file

git-svn-id: https://plugins.svn.wordpress.org/hierarchical-navigation-widget/trunk@823116 b8457f37-d9ea-0310-8a92-e5e31aec5664