Add plugin create functionality.

Signed-off-by: Anusha Ragunathan <anusha@docker.com>

interface_experimental.go

@@ -1,6 +1,8 @@
 package client
 
 import (
+	"io"
+
 	"github.com/docker/docker/api/types"
 	"golang.org/x/net/context"
 )
@@ -27,4 +29,5 @@ type PluginAPIClient interface {
 	PluginPush(ctx context.Context, name string, registryAuth string) error
 	PluginSet(ctx context.Context, name string, args []string) error
 	PluginInspectWithRaw(ctx context.Context, name string) (*types.Plugin, []byte, error)
+	PluginCreate(ctx context.Context, createContext io.Reader, options types.PluginCreateOptions) error
 }

plugin_create.go

@@ -0,0 +1,26 @@
+package client
+
+import (
+	"io"
+	"net/http"
+	"net/url"
+
+	"github.com/docker/docker/api/types"
+	"golang.org/x/net/context"
+)
+
+// PluginCreate creates a plugin
+func (cli *Client) PluginCreate(ctx context.Context, createContext io.Reader, createOptions types.PluginCreateOptions) error {
+	headers := http.Header(make(map[string][]string))
+	headers.Set("Content-Type", "application/tar")
+
+	query := url.Values{}
+	query.Set("name", createOptions.RepoName)
+
+	resp, err := cli.postRaw(ctx, "/plugins/create", query, createContext, headers)
+	if err != nil {
+		return err
+	}
+	ensureReaderClosed(resp)
+	return err
+}