* Turn print-user/group into a single-role version of print-users/groups so we can use it after successful invocations of add/alter user/group commands
* Create print-grants <user|group> to replace the old print-user/group
* Make print_grants much less noisy by making the console_table code smarter
* Allow user/ and group/ prefixes for print-grants, also fix old render bug with print-grants and groups
* Extend unit tests

Related branches by the same name appear under riak, riak_test, and basho_docs.
Merge pull request #551 from basho/jrd-print-grants

Make print-user/group look like print-users/groups