Moved dataLayer definition to the end of <head> so that the container code can be shown just after the opening <body> tag. This enables webmaster tools verification to work.

git-svn-id: https://plugins.svn.wordpress.org/duracelltomi-google-tag-manager/trunk@847595 b8457f37-d9ea-0310-8a92-e5e31aec5664
test #1: tags missing on wp.org

git-svn-id: https://plugins.svn.wordpress.org/duracelltomi-google-tag-manager/trunk@847599 b8457f37-d9ea-0310-8a92-e5e31aec5664
revert test #1

git-svn-id: https://plugins.svn.wordpress.org/duracelltomi-google-tag-manager/trunk@847600 b8457f37-d9ea-0310-8a92-e5e31aec5664