* user/barrier.t, user/clock.t, user/concepts.t, user/cpuuse.t,
user/init.t, user/intr.t, user/io.t, user/mp.t, user/rtmon.t,
user/sem.t, user/stackchk.t, user/task.t, user/timer.t: Updated the
Ada documentation to reflect the current binding.
* new_chapters/Makefile.am, new_chapters/gen_section,
new_chapters/new_chapters.texi, user/Makefile.am, user/c_user.texi,
user/dirstat.texi: Promote CPU Usage to first class citizen. Rename
to start with rtems_ and include documentation in user guide.
* user/cpuuse.t: New file.
* new_chapters/cpuuse.t: Removed.
