* remove "in-tree vs generated" check as there is no in-tree anymore
* add protobuf to requirements-dev
* use requirements-dev in tox
travis: do not diff generated against (missing) in-tree messages
travis: in tox env, use requirements-dev
This drops the command line options. `libusb` is now required
unconditionally (it's cffi so no harm there). hidapi is an extra.
You either need to install it manually, or specify it in your
requirements.txt like so:
trezor[hidapi] >= 0.9.2