HA compatibility fixes and config generator

This release is functionally unchanged. It is mainly to update the code to remove deprecation warnings. In particular, the services should now work better in the UI.

In addition, the old, outdated example configuration has been removed. Instead, a utility script called make_config.py has been added to simplify the creation of yaml defining template sensors that will reflect the state of the amplifier.

• The script will generate both legacy and modern template configuration
• Both the legacy and modern template include a unique_id
• The legacy format generated by default should generate yaml with consistent entity ids to the original example - check it carefully but it should be possible to remove the old yaml and paste in the new
• See the updated README for information on how to use the script

Initial Release

This is the inital HACS release for the Rotel integration

Breaking change

In order to align with the brands repository and to allow for future support of other products, the domain for this integration has been changed. Simply change the platform entry in configuration.yaml from rotel_rsp1570 to rotel. A very basic configuration.yaml entry might now look like this:

media_player:
  - platform: rotel
    unique_id: rotel_rsp1570
    name: "Rotel RSP-1570"
    device: /dev/ttyUSB0