o Long-awaited ioctl interface clean-up. *** Not backwardly compatible ***

o Long-awaited ioctl interface clean-up.  *** Not backwardly compatible ***
o Various other kernel side tidy-ups.
o Version number changes so we have the option of adding new ioctl commands
  in future without affecting the use of existing ones should you later
  revert to an older kernel but not revert the userspace library/tools.
o Better separation of kernel/userspace elements in the build process to
  prepare for independent distribution of the kernel driver.