Adds both build and push support

This adds support for building and pushing docker containers
when you perform either `kompose convert` or `kompose up`.

Docker Compose files who have build parameters with their respective
image and build keys will automatically be both built and pushed.

pkg/utils/docker/client.go

@@ -0,0 +1,36 @@
+/*
+Copyright 2016 The Kubernetes Authors All rights reserved
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package docker
+
+import (
+	"github.com/fsouza/go-dockerclient"
+)
+
+func DockerClient() (*docker.Client, error) {
+
+	// Default end-point, HTTP + TLS support to be added in the future
+	// Eventually functionality to specify end-point added to command-line
+	endpoint := "unix:///var/run/docker.sock"
+
+	// Use the unix socker end-point. No support for TLS (yet)
+	client, err := docker.NewClient(endpoint)
+	if err != nil {
+		return client, err
+	}
+
+	return client, nil
+}