* Fix issue #16606
Some projectors do not respond to pjlink requests during a short period after the status changes or when its in standby, resulting in pypjlink2 throwing an error. This fix catches these errors. Furthermore, only the status 'on' and 'warm-up' is interpreted as switched on, because 'cooling' is actually a switched off status.
* Update pjlink.py
Improved error handling
* Update pjlink.py
Improved error handling
* Update pjlink.py
Clean up
* add pjlink media player component
* retrieve pjlink device name from projector if name isn't specified in configuration
* update .coveragerc
* fix style
* add missing docstrings
* address PR comments from @MartinHjelmare
* fix code style
* use snake case string for source names
* add missing period at the end of comment string
* rewrite method as function
* revert to use source name provided by projector
emkay82
Fabian Affolter
Paulus Schoutsen
Benoit Louy