cmd package implementation

Key Points

1. command line tools

Work Package Deliverables

No	Deliverable	Proof
1	Creating wrappers for offering all functionalities via command line	specified and added to the test-suite appropriately
2	Expand the commands to cover more functionalities; will define tasks that need to go to this package as we implement / design other packages	defined, specified and added to test-suite appropriately
3	Support all new required functionalities that get identified during the process of re-factoring and further;	the structure of the package is clear so that other developers can add new functionalities and specify as needed

Timeline

Additional notes and context

1. related to the api package, as all dms functionality will be exposed via api package so that cmd package will eventually use api in the background (@dagimsisay , please confirm this);