Missing: Handling of embedded interfaces.

Also, for reasons outlined in the previous CL (5500055), embedded
types have to be exported for its "inherited" methods to be visible.
This will be addressed w/ a subsequent CL.

R=r, rsc
CC=golang-dev
https://golang.org/cl/5502059

TBR=rsc

R=rsc
CC=golang-dev
https://golang.org/cl/5498070

TBR=rsc

R=rsc
CC=golang-dev
https://golang.org/cl/5504075

Each test gets a private signal channel.
Also fix a bug that prevented parallel tests from running.

R=r, r
CC=golang-dev
https://golang.org/cl/5505061

Log always adds spaces between operands, like Println but unlike Print

R=golang-dev
CC=golang-dev
https://golang.org/cl/5504069

Fixes #2580 up to a point.

R=rsc
CC=golang-dev
https://golang.org/cl/5498068

1) Add EscapeCodes to the terminal so that applications don't wire
   them in.
2) Add a callback for auto-complete
3) Fix an issue with input lines longer than the width of the
   terminal.
4) Have Write() not stomp the current line. It now erases the current
   input, writes the output and reprints the prompt and partial input.
5) Support prompting without local echo in Terminal.
6) Add GetSize to report the size of terminal.

R=bradfitz
CC=golang-dev
https://golang.org/cl/5479043

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/5504070

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/5503065

* group builders in to columns by OS
* drop builder suffix (moved to hover title)
* cut all domain names from email (full name+email in hover title)
* make ok smaller

This should easily give us room for netbsd and plan9,
even on small laptop screens.

Running at http://build-rsc.golang.org/.

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/5501064

Or else eventually someone will check it in.

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/5504071

R=golang-dev, alex.brainman, rsc
CC=golang-dev
https://golang.org/cl/5502066

R=golang-dev, rsc, n13m3y3r, rogpeppe
CC=golang-dev
https://golang.org/cl/5501060

R=golang-dev, mikioh.mikioh
CC=golang-dev
https://golang.org/cl/5504068

R=golang-dev, bradfitz, adg
CC=golang-dev
https://golang.org/cl/5501062

Still a mystery. New issue 2603 filed.

R=golang-dev, dsymonds, iant
CC=golang-dev
https://golang.org/cl/5503063

R=rsc
CC=golang-dev
https://golang.org/cl/5504067

R=rsc
CC=golang-dev
https://golang.org/cl/5502063

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/5501058

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/5504066

R=golang-dev, dsymonds, rsc
CC=golang-dev
https://golang.org/cl/5505056

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/5504063

R=iant, rsc
CC=golang-dev
https://golang.org/cl/5500065

Fixes #2596.

R=golang-dev
CC=golang-dev
https://golang.org/cl/5498061

R=golang-dev
CC=golang-dev
https://golang.org/cl/5498062

R=golang-dev, r
CC=golang-dev
https://golang.org/cl/5502062

* work around a linker/cgo bug
* do not run deps.bash on Windows unless we need it
  (cuts a full minute off the build time)
* add windows to the list of cgo-enabled targets

The gopack problem is issue 2601.

R=golang-dev, r, bradfitz
CC=golang-dev
https://golang.org/cl/5504062

R=golang-dev, adg
CC=golang-dev
https://golang.org/cl/5502060

Fixes #2593.

R=rsc, alex.brainman, n13m3y3r
CC=golang-dev
https://golang.org/cl/5500052

Fixes #2600

R=golang-dev, agl, rsc
CC=golang-dev
https://golang.org/cl/5500064

No visible external changes yet. The current approach is
a stop-gap approach: For methods of anonymous fields to be
seen, the anonymous field's types must be exported.

Missing: computing the actual MethodDocs and displaying them.

(Depending on the operation mode of godoc, the input to go/doc
is a pre-filtered AST with all non-exported nodes removed. Non-
exported anonymous fields are not even seen by go/doc in this
case, and it is impossible to collect associated (even exported)
methods. A correct fix will require some more significant re-
engineering; AST filtering will have to happen later, possibly
inside go/doc.)

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/5500055

TBR=golang-dev
CC=golang-dev
https://golang.org/cl/5504056

R=lvd
CC=golang-dev
https://golang.org/cl/5500060

This lets us mark net's cgo_stub.go as only to be
built when cgo is disabled.

R=golang-dev, ality, mikioh.mikioh
CC=golang-dev
https://golang.org/cl/5489100

R=rsc
CC=golang-dev
https://golang.org/cl/5501053

R=golang-dev
CC=golang-dev
https://golang.org/cl/5500061

TBR=golang-dev
CC=golang-dev
https://golang.org/cl/5489102

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/5503057

* correct dependency calculations
* comment meaning of action fields
* new alias "std" like "all" but standard packages only
* add -o flag to 'go build'
* set up for parallel build (still serial)
* understand that import "C" depends on cgo, runtime/cgo

R=golang-dev, mikioh.mikioh
CC=golang-dev
https://golang.org/cl/5502055

This CL makes both InterfaceAddrs and Addrs method on Interface
return IPNet struct for representing interface address and mask
like below:

interface "lo0": flags "up|loopback|multicast", ifindex 1, mtu 16384
        interface address "fe80::1/64"
        interface address "127.0.0.1/8"
        interface address "::1/128"
        joined group address "ff02::fb"
        joined group address "224.0.0.251"
        joined group address "ff02::2:65d0:d71e"
        joined group address "224.0.0.1"
 	joined group address "ff01::1"
        joined group address "ff02::1"
        joined group address "ff02::1:ff00:1"

Fixes #2571.

R=rsc
CC=golang-dev
https://golang.org/cl/5489062