A step towards "externalizing" some Go docs.
+ style sheet: like code.google.com but less feature-ful
+ JS with table-of-contents generation
+ tweaked go_spec.html and go_mem.html to use new style+JS
+ static-HTML-ified a few other Go docs:
+ static HTML versions of some wiki pages (which I'll turn
into links to these pages).
A notable thing that is _not_ in this changelist: any change
to the godoc tool or whatever thing generates http://go/godoc