Factor each commmand into its own package

cmd/rmdir/rmdir.go

@@ -0,0 +1,26 @@
+package rmdir
+
+import (
+	"github.com/ncw/rclone/cmd"
+	"github.com/ncw/rclone/fs"
+	"github.com/spf13/cobra"
+)
+
+func init() {
+	cmd.Root.AddCommand(rmdirCmd)
+}
+
+var rmdirCmd = &cobra.Command{
+	Use:   "rmdir remote:path",
+	Short: `Remove the path if empty.`,
+	Long: `
+Remove the path.  Note that you can't remove a path with
+objects in it, use purge for that.`,
+	Run: func(command *cobra.Command, args []string) {
+		cmd.CheckArgs(1, 1, command, args)
+		fdst := cmd.NewFsDst(args)
+		cmd.Run(true, command, func() error {
+			return fs.Rmdir(fdst)
+		})
+	},
+}