Release 2.3

Before easter release

A shorter release cycle this time, but with some changes to the API (see previous post), minor improvement to the MBus-code for units that implement more aggressive timeout behaviour, and new modbus devices.

The major features this release was:
- Ziehl-Abegg Unicon Mode 1.0x and 4.0x support - New API functions - Adjustment for signed offset on thermia devices - Installation mode for freshly provisioned devices