Changes

Make Duration constructors unambiguous

This requires fromSeconds to be the new default.
And it's not possible anymore to create Durations by specifying e.g. hour only.
But unless you write tests or doc, this is not really needed I would say.

Make Duration constructors unambiguous

This requires fromSeconds to be the new default.
And it's not possible anymore to create Durations by specifying e.g. hour only.
But unless you write tests or doc, this is not really needed I would say.