Add MDX documentation

Refactor code and add support flag

* Refactor code and add support flag

* Change method name

Add Multi-Zone and MDX support

* Add multi zone
* Add support for MDX and MDA (Martin Logan)

- Remove space in model name for MDX series

- Populate input name for MDX
- Add additional command to ignore for MDX

- Add support for multi zone

- Add support for MDX and MDA

Fix Readme

Bump version to v1.3.1 (#29)

* Bump version to 1.3.1

Add support for x40 series (#27)

* Add support for x40 series

* Fix async and blocking issues with Home Assistant

* Avoid refreshing data too often when receiver is starting

* Add initialised function to better support HA UI setup

Bump to Version 1.2.0

Bump version