Added settings for choosing your own date formats, improved translation support, bug fix for repeating events

git-svn-id: https://plugins.svn.wordpress.org/event-list-calendar/trunk@998380 b8457f37-d9ea-0310-8a92-e5e31aec5664
Added screenshot of settings page

git-svn-id: https://plugins.svn.wordpress.org/event-list-calendar/trunk@998387 b8457f37-d9ea-0310-8a92-e5e31aec5664