doc/go1.2.html: add a "New packages" section similar to http://golang.org/doc/go1.1#new_packages
doc/go1.2.html: add a "New packages" section similar to
http://golang.org/doc/go1.1#new_packages

R=r
CC=golang-dev
https://codereview.appspot.com/13368053

apparentlymart/golang,apparentlymart/golang,apparentlymart/golang,pombredanne/go-deleteme,tv42/old-go,pombredanne/go-deleteme,apparentlymart/golang,tv42/old-go,tv42/old-go,apparentlymart/golang,pombredanne/go-deleteme,pombredanne/go-deleteme,tv42/old-go,tv42/old-go,tv42/old-go,tv42/old-go,pombredanne/go-deleteme,apparentlymart/golang,pombredanne/go-deleteme,pombredanne/go-deleteme,apparentlymart/golang