Copy dependencies into vendor dir, using dep

vendor/github.com/docker/docker/client/checkpoint_create.go

@@ -0,0 +1,13 @@
+package client // import "github.com/docker/docker/client"
+
+import (
+	"github.com/docker/docker/api/types"
+	"golang.org/x/net/context"
+)
+
+// CheckpointCreate creates a checkpoint from the given container with the given name
+func (cli *Client) CheckpointCreate(ctx context.Context, container string, options types.CheckpointCreateOptions) error {
+	resp, err := cli.post(ctx, "/containers/"+container+"/checkpoints", nil, options, nil)
+	ensureReaderClosed(resp)
+	return err
+}