Added userquery short code which allows you to query the wp_users and wp_usermeta tables and display results. Added support for multiple select menu selections. Added support for displaying fields based on user role.

git-svn-id: https://plugins.svn.wordpress.org/user-meta-manager/trunk@788729 b8457f37-d9ea-0310-8a92-e5e31aec5664
Fixed a variable conflict. Verified compatibility with WordPress 3.7.

git-svn-id: https://plugins.svn.wordpress.org/user-meta-manager/trunk@794068 b8457f37-d9ea-0310-8a92-e5e31aec5664