Fixed *x* and the like in Chapter 3 plus 2 typos in CMA06-1
Overhaul Chapter 3

Overhaul:

Check -full on MathJax
Add Appendix to Nav
new norm in navigation
trade ' in nav &#8217;
look at ref in exercises
Add text roman to all lists
Check refs in chapter 2
Save as you go
Process the two typos in CMA06-1