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/container_commit.go

@@ -0,0 +1,53 @@
+package client
+
+import (
+	"encoding/json"
+	"errors"
+	"net/url"
+
+	distreference "github.com/docker/distribution/reference"
+	"github.com/docker/docker/api/types"
+	"github.com/docker/docker/api/types/reference"
+	"golang.org/x/net/context"
+)
+
+// ContainerCommit applies changes into a container and creates a new tagged image.
+func (cli *Client) ContainerCommit(ctx context.Context, container string, options types.ContainerCommitOptions) (types.ContainerCommitResponse, error) {
+	var repository, tag string
+	if options.Reference != "" {
+		distributionRef, err := distreference.ParseNamed(options.Reference)
+		if err != nil {
+			return types.ContainerCommitResponse{}, err
+		}
+
+		if _, isCanonical := distributionRef.(distreference.Canonical); isCanonical {
+			return types.ContainerCommitResponse{}, errors.New("refusing to create a tag with a digest reference")
+		}
+
+		tag = reference.GetTagFromNamedRef(distributionRef)
+		repository = distributionRef.Name()
+	}
+
+	query := url.Values{}
+	query.Set("container", container)
+	query.Set("repo", repository)
+	query.Set("tag", tag)
+	query.Set("comment", options.Comment)
+	query.Set("author", options.Author)
+	for _, change := range options.Changes {
+		query.Add("changes", change)
+	}
+	if options.Pause != true {
+		query.Set("pause", "0")
+	}
+
+	var response types.ContainerCommitResponse
+	resp, err := cli.post(ctx, "/commit", query, options.Config, nil)
+	if err != nil {
+		return response, err
+	}
+
+	err = json.NewDecoder(resp.body).Decode(&response)
+	ensureReaderClosed(resp)
+	return response, err
+}