NewManager is the canonical way of initializing Manager.

Manager contains the main machinery of this framework.

ListerInterface serves as an interface between imlementation and Manager machinery.

PluginInterface is a mandatory interface that must be implemented by all plugins.

PluginInterfaceStart is an optional interface that could be implemented by plugin.

PluginInterfaceStop is an optional interface that could be implemented by plugin.

PluginNameList contains last names of discovered resources.