Upgraded tcpdf, added author and post_thumb callbacks

git-svn-id: https://plugins.svn.wordpress.org/kalins-pdf-creation-station/trunk@865158 b8457f37-d9ea-0310-8a92-e5e31aec5664
fixed php warning on settings page

git-svn-id: https://plugins.svn.wordpress.org/kalins-pdf-creation-station/trunk@865175 b8457f37-d9ea-0310-8a92-e5e31aec5664
updated readme for official release

git-svn-id: https://plugins.svn.wordpress.org/kalins-pdf-creation-station/trunk@865196 b8457f37-d9ea-0310-8a92-e5e31aec5664
This should actually bump the version number

git-svn-id: https://plugins.svn.wordpress.org/kalins-pdf-creation-station/trunk@865203 b8457f37-d9ea-0310-8a92-e5e31aec5664