Feature: crm_mon: Display brief output if "-b/--brief" is supplied or 'b' is toggled

It's very helpful if there are many same types of resources.

If -b/--brief is supplied, the output is like:

6      (ocf::pacemaker:Dummy): Active node1

If -r/--inactive is also supplied:

6/10   (ocf::pacemaker:Dummy): Active node1
0/5    (ocf::heartbeat:Dummy): Active

Output for a group is like:
 Resource Group: group1
     18/20  (ocf::pacemaker:Dummy): Active node1
     12/15  (ocf::heartbeat:Dummy): Active node1

If -n/--group-by-node is also supplied, the output of the node is like:

Node node1: online
        24      (ocf::pacemaker:Dummy): Active
        12      (ocf::heartbeat:Dummy): Active
Merge pull request #419 from gao-yan/crm_mon-brief

Feature: crm_mon: Display brief output if "-b/--brief" is supplied or 'b' is toggled