Feature: Expose CCU commands?

[gavalierm]

• I'm submitting a ...
  [ ] bug report
  [X] feature request
  [ ] question about the decisions made in the repository
  [ ] question about how to use this project

• Summary
  There is option to read and emit CCU message from Camera Tab? I see this lib have command receive event private, and it expose only stateChange. But CCU looks like is not part of state.

If will be possible to expose RAW CCU payload i try to write some wrapper to handle this data. But if is wiped out is not possible.

Thank you.

• Other information (e.g. detailed explanation, stacktraces, related issues, suggestions how to fix, links for us to have context, eg. StackOverflow, personal fork, etc.)

[gavalierm]

Looks like #85 but i want to expose raw payloads, becayse i want to pass it directly to the camera without any modifications. (Because ccu on atem is big guessing, but if i do not step in between it works, looks like that.)