Added Template for "Insufficient Funds" and for "Visitors". Added table to checkout page to show users current balance, cost in points and balance after purchase.

git-svn-id: https://plugins.svn.wordpress.org/mycred/trunk@753482 b8457f37-d9ea-0310-8a92-e5e31aec5664
readme.txt update

git-svn-id: https://plugins.svn.wordpress.org/mycred/trunk@753485 b8457f37-d9ea-0310-8a92-e5e31aec5664