This allows us to return early from a `write`, which we need in cases
where we want to perform an operation inbetween `read` and `write` -
namely, callback for ButtonRequest should technically be invoked after
returning ButtonAck but before waiting for device's response.
Of course that doesn't really work. The callback will actually be
invoked _before_ ButtonAck, so there's still the condition that it must
return immediately or the device gets stuck with a black screen.
But doing this allows us to write code *as if* it worked, which lets the
other transports run free and wild, by which I mean, do the Right Thing
This clarifies the intent: the project is licenced under terms
of LGPL version 3 only, but the standard headers cover only "3 or later",
so we had to rewrite them.
In the same step, we removed author information from individual files
in favor of "SatoshiLabs and contributors", and include an AUTHORS
file that lists the contributors.
Apologies to those whose names are missing; please contact us if you wish
to add your info to the AUTHORS file.
