grab upstream docs, changes

"upstream docs" are nolonger mythical. also in the future could
everyone (i.e. Chris) *SEPARATE* code-changes into commits distinct
from massive reorganization, so that the whole file doesn't appear
deleted? it's difficult to identify changes when every single file in
the project is deleted and pasted elsewhere

Also the DEFAULT_BUS_SPEED_HZ is distinct from the param.h values, and
possibly incorrect