Updated mycred_link shortcode to support target="_blank" also added support for %title% template tags.

git-svn-id: https://plugins.svn.wordpress.org/mycred/trunk@771517 b8457f37-d9ea-0310-8a92-e5e31aec5664
POT update

git-svn-id: https://plugins.svn.wordpress.org/mycred/trunk@771523 b8457f37-d9ea-0310-8a92-e5e31aec5664