Reintroduced unwrap continuation
Adjust .then implicit unwrapping
Adjust unwrap regression test case
Reintroduce fixed "Instead of sending a managed target id for the action triggered by a future we now keep that id alive locally. That will reduce the amount of necessary id splitting."

This reverts commit 990d2b8c96316cb27ad86ee98eb14c8c7868e974.
Adjust unwrap regression test case
Removes unwrap member function (the unwrapping constructor remains).
Merge pull request #1184 from STEllAR-GROUP/unwrap

Tweaking future unwrapping