Changes
- Enhancement: deduce the type of device and brand based on serial number.
- Enhancement: inform users when we choose not to add a device to HomeKit because we don't support it yet.
- Bugfix: don't attempt to open or close the door if we're already in that state.
- Bugfix: acquire a new myQ API security token regularly (thanks @dxdc for helping track this one down).
- Bugfix: address a potential race condition when we check for battery information availability (on supported models).