Pilight component (#2742)

* New component to interface with a pilight-daemon for RF send/receive

* Fix bug that changed the received data, add connected flag, clean up

* New pilight switch component

* New optional whitelist filter to filter uninteressting devices

* Add pilight

* PEP8: too long lines, white spaces

* To keep up the good coverage ...

* PEP 257

* pylint enhancements

* pylint enhancements

* PEP 257

* Better HA config validation and cleanup following code review for #2742

* Fix requirenments to require fixed pilight version

* Change config validation to use voluptuous

* Pilight switch exclude not needed due to wildcard pilight exclude

* Enhance configuration parsing using voluptuous