* Added --tool flag that allows user to specify "gccgo" as the tool to build.
* Added builderEnv struct to abstract away setting up the build.
* Made envv and envvWindows methods of the builderEnv struct.
* Modified Builder.envv() to wrap envv and envvWindows
* Added internal builderEnv in Builder.
R=adg
CC=golang-dev
https://golang.org/cl/13240044
To make the dashboard more flexible with different VCS, the Repo now depends on the VCS package for running commands.
* Exported Repo.Master
* Modified RemoteRepo to return a repo and an error
* Reimplemented all Repo methods using vcs package
* Removed hgCmd
* Removed repoURL
* Removed scheme from hgUrl since vcs.RepoRootForImportPath decides the scheme.
* Changed waitWithTimeout into timeout
* Added waitForFuncWithTimeout to wrap vcs commands with a timeout.
R=adg
CC=golang-dev
https://golang.org/cl/13201043
Moving misc/dashboard to its new home. It will be deleted
(except for misc/dashboard/codereview) from its current home
if this is approved.
R=golang-dev, bradfitz, cmang, adg
CC=golang-dev
https://golang.org/cl/12180043
