Extended list of host-resource
Add findSnapshot() on group resource
Added is_config(), is_replica(), is_cluster(), source_name() on snapshot resource
Added snapshot_source_name() on restore_job resource
Resource abstract: added reload logic
Added simple caching at cluster&group resource
Added logic to sole bugs of public MMS API (see comments);
- cannot access restoreJob ans snapshot for config-server
- no specific clusterId provided for config-server
Cli client: added more info
Merge pull request #7 from kris-lab/issue-7

Extend params and logic for resources