Release 1.0.3

git-svn-id: https://plugins.svn.wordpress.org/wp-post-to-pdf-enhanced/trunk@865216 b8457f37-d9ea-0310-8a92-e5e31aec5664
Forward ported fix from 1.0.3 for has_shortcode() function; added margin options settable in admin UI (per Cemal's forum request); code cleanup (changed constant stems to WPPTOPDF from WPPT0PDF); updated readme.

git-svn-id: https://plugins.svn.wordpress.org/wp-post-to-pdf-enhanced/trunk@867351 b8457f37-d9ea-0310-8a92-e5e31aec5664