Add Observable.fromNodeCallback

[kwonoj]

PR #729 reminded Observable.fromNodeCallback is also not landed yet. I'll try to create those as well and creating issue for tracking.

[frankbenoit]

is there a pattern that can be used today with 5.0.0-beta.0, to connect to a node callback function?

[lock]

This thread has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue for related bugs.