install go tools (Golang 1.6)
免翻墙安装Go tools (Golang 1.6)
branch="release-branch.go1.6"
mkdir -p $GOPATH/src/golang.org/x
git clone -b $branch https://github.com/golang/tools.git $GOPATH/src/golang.org/x/tools
git clone https://github.com/golang/net.git $GOPATH/src/golang.org/x/net
cd $GOPATH
go install golang.org/x/tools/cmd/goimports
go install golang.org/x/tools/cmd/vet
go install golang.org/x/tools/cmd/oracle
go install golang.org/x/tools/cmd/godoc