Provision to export tips

git-svn-id: https://plugins.svn.wordpress.org/st-daily-tip/trunk@794020 b8457f37-d9ea-0310-8a92-e5e31aec5664
removal of bugs

git-svn-id: https://plugins.svn.wordpress.org/st-daily-tip/trunk@794032 b8457f37-d9ea-0310-8a92-e5e31aec5664
allow to show date

git-svn-id: https://plugins.svn.wordpress.org/st-daily-tip/trunk@794636 b8457f37-d9ea-0310-8a92-e5e31aec5664