fmc-bus version 1.0

After development within the spec-sw package, where it is at
the basis of release 2.0 and later of that package, the kernel
support for the bus called “fmc” is now a separate project.
Users of spec-sw will notice almost no differences, as the package
is now a git sub-module of spec-sw and all modules are installed by
a single “make install”.

As usual with the release process, I placed a tag “fmc-bus-v1.0”
in the git repository, and uploaded two files: the pdf
and a tar of the git clone, with precompiled documentation, to ease
people who didn’t install TeX.

This paves the way for development of other carrier drivers; such projects
are invited to have fmc-bus and possibly other projects as git submodules,
to ease installation for the final users.