Committed my changes thus far

* misuse of quantum throughout fixed
* various other errors fixed

I'm only about halfway through the piece and still want to
merge at least 5 of the quizzes into the main text.

Also want to kill "of course" and a bunch of words ending in ly.

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Touchups to Dave's edits.

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Added an attempt at some history

Way more to add but I keep hoping with that done the chattier elements
of the main piece can be reduced.

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Added notes.org

Made a bunch of comments and corrections along the way that may
or may not end up in the text.

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>