Move engine-api client package

This moves the engine-api client package to `/docker/docker/client`.

Signed-off-by: Michael Crosby <crosbymichael@gmail.com>

client/plugin_inspect.go

@@ -0,0 +1,30 @@
+// +build experimental
+
+package client
+
+import (
+	"bytes"
+	"encoding/json"
+	"io/ioutil"
+
+	"github.com/docker/docker/api/types"
+	"golang.org/x/net/context"
+)
+
+// PluginInspectWithRaw inspects an existing plugin
+func (cli *Client) PluginInspectWithRaw(ctx context.Context, name string) (*types.Plugin, []byte, error) {
+	resp, err := cli.get(ctx, "/plugins/"+name, nil, nil)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	defer ensureReaderClosed(resp)
+	body, err := ioutil.ReadAll(resp.body)
+	if err != nil {
+		return nil, nil, err
+	}
+	var p types.Plugin
+	rdr := bytes.NewReader(body)
+	err = json.NewDecoder(rdr).Decode(&p)
+	return &p, body, err
+}