* Update webcam module to set the camera framerate
* Add framerate to property fitness function
* Set framerate to dummy VideoRecord
* Add tests about video constraints
* Set framerate only when a positive value is specified
Changelog:
* Better support for non-webrtc use cases
* Enable multiple readers
* Enhance codec selectors
* Update APIs to reflect on the new v3 webrtc design
* Cleaner APIs
Resolves https://github.com/pion/mediadevices/issues/114
* Remove codec registrar
* Completely redesign how codec is being discovered, tuned, and built
* Update examples
* Update unit tests