0.6.0

Features

• Add byte array parsing/encoding utils to CommandClient
• Add an INVOKE wrapper to CommandClient
• Add first and afirst methods to QuerySet
• Add 'last_updated' state to Master objects, to help detect controller programming events
• Fetch firmware version for Master objects
• Add additional methods to discovery module
• Fetch state for LoadGroup objects

Fixes

• Treat empty string credentials as not present

Breaking

• Renamed OBJECT_REMOVED event to OBJECT_DELETED
• Renamed DiscoveredVantageController to VantageControllerDetails