Trivial/device steps

CDeviceSst was changed to use SetGateway() rather than StepGateway().
This is probably for the better, but (a) the documentation was not
updated, and (b) all of the other devices retained Step variants. This
is madness, so let's just use Set for all of them.

Also, remove the Windows line ending from all of these files, since otherwise I cannot get any changes past the default pre-commit hook, which I have enabled locally.