added the git clone installation option to the README
added the git clone installation option to the README

git-svn-id: d2b2af9684d8e32c2cf543bbc2b61abbd27cd78b@28155 ee427ae8-e902-0410-961c-c3ed070cd9f9

aalbagarcia/ahDoctrineEasyEmbeddedRelationsPlugin,aalbagarcia/ahDoctrineEasyEmbeddedRelationsPlugin