* Clean up demo camera
* Complete test_motion_detection
* Clean up image reading
* Clean up camera integration async methods
* Fix and clean camera integration tests
* Fix image processing patch
* Store last working HTTP settings
* Add safe mode
* Fix tests
* Add cloud to safe mode
* Update logging text
* Fix camera tests leaving files behind
* Make emulated_hue tests not leave files behind
* Make logbook tests not leave files behind
* Make tts tests not leave files behind
* Make image_processing tests not leave files behind
* Make manual_mqtt tests not leave files behind
* initial commit for camera preferences and preload stream
* cleanup and add tests
* respect camera preferences on each request stream call
* return the new prefs after update
* 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
## Description:
More fixes flagged by pylint 2 that don't hurt to have before the actual pylint 2 upgrade (which I'll submit soon).
## Checklist:
- [ ] The code change is tested and works locally.
- [x] Local tests pass with `tox`. **Your PR cannot be merged unless tests pass**