* Remove unsupported "all" meta-permission from riak_core_console
* Correct recent "succesfully" typo
* riak_core_security:del_source/2 cannot return errors, so don't watch for them in console
* Remove last function clause from both add_source/4 and del_source/2 to avoid infinite loop problem previously identified with add_grant/add_revoke
* Update type specs: user lists are binary(), not string(), and update add_source to reflect loss of the last clause
* Update unit tests to reflect update to add_source/4 clause