Change password and account delete requests take UUID, not email, as parameter

	modified:   .htaccess
	modified:   api/users/delete.php
	modified:   api/users/put.php
Sync uses PUT

	modified:   .htaccess
	modified:   api/notes/index.php
Return code 304 if there are no modified notes for client

	modified:   api/notes/index.php