Display where plugins are loaded from

[saltybeagle]

When a user executes pyrus from CLI, it would be helpful to:

• notify the user when additional commands are being loaded (security)
• inform what the plugin directory is, just in case a plugin blows up and needs removing

This also will help developers that are trying to work on plugins and aren't aware that they have a version of their plugin installed already. Could be only shown when verbosity, -v is increased.