user time for pidigits -s -n=10000:
6.466s w/ adds
7.138s w/ shifts

R=rsc
CC=golang-dev
https://golang.org/cl/1021041

R=r
CC=golang-dev
https://golang.org/cl/989044

Fixes #732.

R=ken2
CC=golang-dev
https://golang.org/cl/956050

R=r
CC=golang-dev
https://golang.org/cl/989042

R=r
CC=golang-dev
https://golang.org/cl/943047

R=r
CC=golang-dev, rog
https://golang.org/cl/811046

       (composite literals in control clauses only need
       parentheses if the literals start with a type name)

R=rsc
CC=golang-dev
https://golang.org/cl/962045

where index is a composite literal

R=rsc
CC=golang-dev
https://golang.org/cl/961044

	   within an if, for, or switch control clause

R=rsc
CC=golang-dev
https://golang.org/cl/943046

Fixes #748.

R=rsc
CC=golang-dev
https://golang.org/cl/946043

R=r, cw
CC=golang-dev
https://golang.org/cl/952041

This fixes a crash seen when viewing a directory list.

Fixes #747.

R=gri
CC=golang-dev, rsc
https://golang.org/cl/1010042

This matches the old JSON package behavior.
All lowercase names are not as standard as I believed,
and it seems less surprising to need to write

	type T struct { Field string "field" }

to get lower case (behavior after this CL) than it does to need
to write

	type T struct { Field string "Field" }

to preserve the case (behavior before this CL).

Also test and  fix unmarshal into non-nil interface
value or pointer.

Fixes #744.

R=r
CC=golang-dev
https://golang.org/cl/1013041

Added goroutine; got simpler.

Fixes deadlock when doing Read+Close
or Write+Close on same end.

R=r, cw
CC=golang-dev
https://golang.org/cl/994043

R=rsc
CC=golang-dev
https://golang.org/cl/949043

Fixes #734.

R=rsc, r
CC=golang-dev
https://golang.org/cl/975042

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/988042

R=rsc, rsc1
CC=golang-dev
https://golang.org/cl/878046

R=rsc
CC=golang-dev
https://golang.org/cl/897042

R=rsc
CC=golang-dev
https://golang.org/cl/1014041

R=rsc
CC=golang-dev
https://golang.org/cl/968043

R=r, rsc
CC=golang-dev
https://golang.org/cl/978042

R=rsc
CC=golang-dev
https://golang.org/cl/937042

R=ken2, r, ken3
CC=golang-dev
https://golang.org/cl/1006041

R=adg, gri
CC=golang-dev, r
https://golang.org/cl/1008042

Depends on CL 957045, 980043, 1004043.
Fixes #715.

R=agl1, agl
CC=golang-dev
https://golang.org/cl/943043

Adds two more methods, Timeout and Temporary.
Implemented by os.Errno too.  The intent is to make
the checks for os.EAGAIN a little less clunky.
It should also let us clean up a bug that Mike Solomon
pointed out: if a network server gets an "out of file descriptors"
error from Accept, the listener should not stop.
It will be able to check this because that error would
have Temporary() == true.

Also clean up some underscore names.

Fixes #442.

R=r
CC=golang-dev, msolo
https://golang.org/cl/957045

R=rsc, r
CC=golang-dev
https://golang.org/cl/1010041

R=r
CC=golang-dev
https://golang.org/cl/1004043

R=r
CC=golang-dev
https://golang.org/cl/980043

R=r
CC=golang-dev
https://golang.org/cl/1009041

R=r
CC=golang-dev
https://golang.org/cl/982043

More in line with other regexp packages
and egrep; accommodates overzealous escapers.

R=r
CC=golang-dev
https://golang.org/cl/1008041

R=ken2
CC=golang-dev
https://golang.org/cl/1007041

Enable package tests for Native Client build.

R=r
CC=golang-dev
https://golang.org/cl/957042

R=rsc
CC=golang-dev
https://golang.org/cl/970042

R=rsc
CC=golang-dev
https://golang.org/cl/962043

Changed most of the functions in nat.go to methods on nat.

R=gri
CC=golang-dev
https://golang.org/cl/976041

Uid, Gid become int.
File size info becomes int64.
Times become int64.

R=rsc, cw
CC=golang-dev
https://golang.org/cl/968042

Everything was linking to "Run_time_panics", but the id was "Run_time_errors".

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/961042