Switch to spf13/cobra from urfave/cli

There's A LOT happening in this commit, so here's an outline:

First off, urfave/cli has been removed in favour of spf13/cobra. With
this, comes changes to the formatting as well as the help page for
Kompose.

Upon converting, I noticed a CLI flag was NOT appearing for OpenShift.
Specifically, --deploymentconfig. This has been added with a note
that says it is OpenShift only.

Exit codes have been fixed. If the conversion / down / up fails for
any reason, Kompose will exit with Code 1.

--verbose as well as --suppress-warnings can now be set at the
same time.

app_test.go in the cli directory has been moved to pkg/transformer
to better reflect the testing coverage.

version.go has been removed and converted to it's own CLI command in
conjuction with (most) Go software. A new CLI command has been
created. kompose version

--dab isn't a conventional way for short-form CLI paramters. This
has been shortened to -b for bundle.

CLI flags consisting of only two/three letters have been removed due to
it being unconventional for CLI. For example, --dc was removed in preference
for --deploymentconfig

--replicas has been added as an option when using kompose down or
kompose up. This has been added as previously in app.go the
replica amount was hard-coded as 1.

Differentiating names have been used for flags. For example,
persistent flags use the name Global (ex. GlobalOut). Command-specific
flags have their own names (ex. UpOpt).

Closes #239 #253

cmd/up.go

@@ -0,0 +1,59 @@
+/*
+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 cmd
+
+import (
+	"strings"
+
+	"github.com/kubernetes-incubator/kompose/pkg/app"
+	"github.com/kubernetes-incubator/kompose/pkg/kobject"
+	"github.com/spf13/cobra"
+)
+
+var (
+	UpReplicas  int
+	UpEmptyVols bool
+	UpOpt       kobject.ConvertOptions
+)
+
+var upCmd = &cobra.Command{
+	Use:   "up",
+	Short: "Deploy your Dockerized application to a container orchestrator.",
+	Long:  `Deploy your Dockerized application to a container orchestrator. (default "kubernetes")`,
+	PreRun: func(cmd *cobra.Command, args []string) {
+
+		// Create the Convert options.
+		UpOpt = kobject.ConvertOptions{
+			Replicas:  UpReplicas,
+			InputFile: GlobalFile,
+			Provider:  strings.ToLower(GlobalProvider),
+			EmptyVols: UpEmptyVols,
+		}
+
+		// Validate before doing anything else. Use "bundle" if passed in.
+		app.ValidateFlags(GlobalBundle, args, cmd, &UpOpt)
+	},
+	Run: func(cmd *cobra.Command, args []string) {
+		app.Up(UpOpt)
+	},
+}
+
+func init() {
+	upCmd.Flags().BoolVar(&UpEmptyVols, "emptyvols", false, "Use Empty Volumes. Do not generate PVCs")
+	upCmd.Flags().IntVar(&UpReplicas, "replicas", 1, "Specify the number of repliaces in the generate resource spec")
+	RootCmd.AddCommand(upCmd)
+}