[EPIC] CLI interface

[rixvet]

Repetitive work done via GUI should also be possible via CLI command interface to allow automation. It's currently requires programming against the user API, a CLI command wrapper would be a nice addition.

[rixvet]

Would also be nice if the CLI interface would be available at the agent, allowing the some functions of the agent (e.g. disable/enable agent) to be executed (with the API key used by the agent software). This is for example quite useful for sysadmins.