Support declaring signals in Rust

[miv-ableton]

I can't yet declare signals in Rust Q_OBJECTS, which is sad because I'd really like that feature.

There seems to be a bunch of commented-out code related to signals. Is anyone working on this feature? If not, I might like to try and make it work myself.

[White-Oak]

See #28

[miv-ableton]

Thanks. I'll refrain from working on this myself, and watch and see what comes next.

[florianjacob]

I'll leave this open for tracking and visibility, and renamed #28 to make it more obvious what's going on there. 😉

The commented-out signal code in the current version did not really work / does not work with current rust. The rewritten version will support signals eventually, probably in the first release.

[AmarOk1412]

Any news? (This project seems dead)