Hell disco

• Image and Video decoding rewrite, it's Promise time.
• Some internal refactorings that made the lib way more powerful dealing with async and stream stuff.
• New capture canvas, video source and image source handling.
• VideoInputDevice now implements MediaDeviceInfo.
• Some methods migrated from the Angular scanner.
  • findDeviceById comes to cover the getDeviceById that once existed in the scanner.
• Some performance improvement.
• Not tested, but probably a lot of bugs fixed that will be listed later.
• Renamed decodeOnceWithDelay to decodeWithRetryAndDelay.

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One step closer to continuous scan.