* initial commit of streams
* refactor stream component
* refactor so stream formats are not considered a platform
* initial test and minor refactor
* fix linting
* update requirements
* need av in tests as well
* fix import in class def vs method
* fix travis and docker builds
* address code review comments
* fix logger, add stream start/stop logs, listen to HASS stop
* address additional code review comments
* beef up tests
* fix tests
* fix lint
* add stream_source to onvif camera
* address pr comments
* add keepalive to camera play_stream service
* remove keepalive and move import
* implement registry and have output provider remove itself from stream after idle, set libav log level to error
Michał Mrozek
Ville Skyttä
Paulus Schoutsen
Jason Hunter