* Added retrieve_password method. It needs user_login var.
* Added get_avatar method. It needs user_id var.
* Added get_userinfo method. It needs user_id var.

git-svn-id: https://plugins.svn.wordpress.org/json-api-user/trunk@878727 b8457f37-d9ea-0310-8a92-e5e31aec5664