* remove velbus fan and light platforms
these platforms should not be there since they can be created with template components based on switch platform
* use latest version of python-velbus which supports auto-discovery of modules
* fix linting errors
* fix linting errors
* fix linting errors
* address review comments from @MartinHjelmare
* update based on automatic feedback
* fix linting errors
* update dependency
* syntax corrections
* fix lint warning
* split out common functionality in VelbusEntity
use sync methods for loading platforms
support unique_ids so that entities are registred in entity registry
* fix linting errors
* fix linting errors
* fix linting errors
* integrate review comments (common functionality in VelbusEntity class)
* rename DOMAIN import to VELBUS_DOMAIN
* revert change created by requirements script
* regen