v1.8, ready for 2014

git-svn-id: https://plugins.svn.wordpress.org/earth-hour/trunk@879278 b8457f37-d9ea-0310-8a92-e5e31aec5664
Fixing ref. to 2013

git-svn-id: https://plugins.svn.wordpress.org/earth-hour/trunk@879287 b8457f37-d9ea-0310-8a92-e5e31aec5664