builtin: document the basic types The recursive definitions are illegal Go, but godoc doesn't mind.
builtin: document the basic types
The recursive definitions are illegal Go, but godoc doesn't mind.

R=bradfitz, r, n13m3y3r, rsc
CC=golang-dev
http://codereview.appspot.com/5322067

h8liu/golang,h8liu/golang,h8liu/golang,h8liu/golang,h8liu/golang,h8liu/golang,h8liu/golang