[Yaml-core] clark's edits

[Clark C . E. <cc...@cl...>]

Rather than modifying the spec directly,
I've put my mods on line in small files.

  yaml.org/cce_one.html  (rewrite of section one)
  yaml.org/cce_two.html  (the new tutorial section)

I have alot of work to do for section two yet, but
you should be able to see the "start" of it and 
the outline.  Comments would be cool.

I'll get to section_three later tonight.

...

Ok.  I have some day job stuff to do for the
next four hours... I'll be back shortly.

Best,

Clark