updated the website

[Phil Wood]

I've finished the markdown files. Some folks also requested the analyses with the free public domain point-and-click software package Jamovi, so i started on that. 

Myself, up to a point it's just easier to run the lavaan syntax, but either way you get the same results. 

As I get the time I'll do the rest of the chapters.

https://sites.google.com/view/understanding-structural-equa/home

I'm happy to say I'm starting to get the galleys on the book, so there's that to keep me out of the pool hall- Phil