Enhance campaign selection; fix authentication bug

git-svn-id: https://plugins.svn.wordpress.org/pardot/trunk@846540 b8457f37-d9ea-0310-8a92-e5e31aec5664
Bump version

git-svn-id: https://plugins.svn.wordpress.org/pardot/trunk@846541 b8457f37-d9ea-0310-8a92-e5e31aec5664