Changed conversion language to english

git-svn-id: https://plugins.svn.wordpress.org/woocommerce-google-adwords-conversion-tracking-tag/trunk@790816 b8457f37-d9ea-0310-8a92-e5e31aec5664
changed the woo_foot hook to the wp_footer hook to avoid problems with some themes

git-svn-id: https://plugins.svn.wordpress.org/woocommerce-google-adwords-conversion-tracking-tag/trunk@791207 b8457f37-d9ea-0310-8a92-e5e31aec5664