Changement d'encodage readme.txt

git-svn-id: https://plugins.svn.wordpress.org/google-quick-ratings/trunk@776823 b8457f37-d9ea-0310-8a92-e5e31aec5664
Ajout lien vers BPG

git-svn-id: https://plugins.svn.wordpress.org/google-quick-ratings/trunk@776826 b8457f37-d9ea-0310-8a92-e5e31aec5664