Refactor plugin into classes; add Media Library view; add front page uploader.

git-svn-id: https://plugins.svn.wordpress.org/wp-user-avatar/trunk@864355 b8457f37-d9ea-0310-8a92-e5e31aec5664
Bug fix for scripts.

git-svn-id: https://plugins.svn.wordpress.org/wp-user-avatar/trunk@865110 b8457f37-d9ea-0310-8a92-e5e31aec5664
Bug fix for edit avatar setting.

git-svn-id: https://plugins.svn.wordpress.org/wp-user-avatar/trunk@868232 b8457f37-d9ea-0310-8a92-e5e31aec5664