Small refactors, better error handling, es_time_left() functionality

git-svn-id: https://plugins.svn.wordpress.org/electric-studio-auto-expire-post/trunk@857346 b8457f37-d9ea-0310-8a92-e5e31aec5664
added 1.6.8 tag and removed unused file

git-svn-id: https://plugins.svn.wordpress.org/electric-studio-auto-expire-post/trunk@857352 b8457f37-d9ea-0310-8a92-e5e31aec5664
Fixed another check that was outputting notices

git-svn-id: https://plugins.svn.wordpress.org/electric-studio-auto-expire-post/trunk@857725 b8457f37-d9ea-0310-8a92-e5e31aec5664
Fixed another check that was outputting notices

git-svn-id: https://plugins.svn.wordpress.org/electric-studio-auto-expire-post/trunk@857726 b8457f37-d9ea-0310-8a92-e5e31aec5664