This is the static version of Forth that is meant to be more portable to
limited and small embedded systems.

This branch is for the development of Forth as a Linux Kernel Module, the
initial commit is far from working. It creates a device, it does not crash and
does some initialization, but there is still a lot of work to do to get this
working.

The idea is that this Forth could be used to debug the Kernel, and just for
fun.

Whilst there is still a lot of work to do, the Forth interpreter now works, a
test program can exercise the module. This is a good starting point from which
the functionality of the module can be expanded.

A test program, "test.c", can be used to test the module.

The module has been rearrange slightly, and some more documentation has been
added.

A device under "/sys" has been added as well, instead of using ioctls to
communicate with the module, devices here will be made instead.

A better test program has been added than "test", called "line", which will
start a REPL with the device.

The CALL instruction has been added so new functions can easily be added to the
interpreter without adding new instructions.