* Add mysensors notify platform
* Make add_devices optional in platform callback function.
* Use new argument structure for all existing mysensors platforms.
* Add notify platform.
* Update mysensors gateway.
* Refactor notify setup
* Enable discovery of notify platforms.
* Update and add tests for notify component and some platforms.
* Continue setup of notify platforms if a platform fails setup.
* Remove notify tests that check platform config. These tests are not
needed when config validation is used.
* Add config validation to APNS notify platform.
* Use discovery to set up mysensors notify platform.
* Add discovery_info to get_service and update tests
* Add discovery_info as keyword argument to the get_service function
signature and update all notify platforms.
* Update existing notify tests to check config validation using test
helper.
* Add removed tests back in that checked config in apns, command_line
and file platforms, but use config validation test helper to verify
config.
* Add a test for notify file to increase coverage.
* Fix some PEP issues.
* Fix comments and use more constants
* Move apns notify service under notify domain
* First pass on providing individual services for all possible targets that a notification platform supports.
* Add a quite hacky first version of notification groups
* Add a docstring for get_targets
* Register group service under notifygroup/ and safely check for notifygroups in config
* Remove notifygroups, because it belongs in its own PR
* Make @balloob requested changes
* get_targets()->targets
* Add tests for notify targets exposed as individual services
* If we dont have a platform name set in configuration, lets use the name of the platform instead of notify
* Fix test docstring.
* Dont use a dictionary for just one value
* No need to double slugify
* targets is now just a list of strings instead of a dict