CLI cleanup (#33)

* Moved cli root command to tap subcommand.

* tap subcommand works.

* Added view and fetch placeholders.

* Updated descriptions.

* Fixed indentation.

* Added versio subcommand.

* Removed version flag.

* gofmt.

* Changed pod from flag to arg.

* Commented out "all namespaces" flag.

cli/config/config.go

@@ -1,16 +1,14 @@
 package config
 
 type Options struct {
-	DisplayVersion   bool
-	Quiet            bool
-	NoDashboard      bool
-	DashboardPort    uint16
-	Namespace        string
-	AllNamespaces    bool
-	KubeConfigPath   string
-	MizuImage        string
-	MizuPodPort      uint16
-	TappedPodName	string
+	Quiet          bool
+	NoDashboard    bool
+	DashboardPort  uint16
+	Namespace      string
+	AllNamespaces  bool
+	KubeConfigPath string
+	MizuImage      string
+	MizuPodPort    uint16
 }
 
 var Configuration = &Options{}