Added Start Date option for popup window (Expiration date option already available).

git-svn-id: https://plugins.svn.wordpress.org/popup-with-fancybox/trunk@948121 b8457f37-d9ea-0310-8a92-e5e31aec5664
1.4 readme.txt

git-svn-id: https://plugins.svn.wordpress.org/popup-with-fancybox/trunk@948124 b8457f37-d9ea-0310-8a92-e5e31aec5664