Factor each commmand into its own package

cmd/version/version.go

@@ -0,0 +1,19 @@
+package version
+
+import (
+	"github.com/ncw/rclone/cmd"
+	"github.com/spf13/cobra"
+)
+
+func init() {
+	cmd.Root.AddCommand(versionCmd)
+}
+
+var versionCmd = &cobra.Command{
+	Use:   "version",
+	Short: `Show the version number.`,
+	Run: func(command *cobra.Command, args []string) {
+		cmd.CheckArgs(0, 0, command, args)
+		cmd.ShowVersion()
+	},
+}