Move deps from _workspace/ to vendor/

godep restore
pushd $GOPATH/src/github.com/appc/spec
git co master
popd
go get go4.org/errorutil
rm -rf Godeps
godep save ./...
git add vendor
git add -f $(git ls-files --other vendor/)
git co -- Godeps/LICENSES Godeps/.license_file_state Godeps/OWNERS

vendor/github.com/docker/engine-api/client/version.go

@@ -0,0 +1,21 @@
+package client
+
+import (
+	"encoding/json"
+
+	"github.com/docker/engine-api/types"
+	"golang.org/x/net/context"
+)
+
+// ServerVersion returns information of the docker client and server host.
+func (cli *Client) ServerVersion(ctx context.Context) (types.Version, error) {
+	resp, err := cli.get(ctx, "/version", nil, nil)
+	if err != nil {
+		return types.Version{}, err
+	}
+
+	var server types.Version
+	err = json.NewDecoder(resp.body).Decode(&server)
+	ensureReaderClosed(resp)
+	return server, err
+}