lsd: Add -R flag and fix and update docs for all ls commands

cmd/ls/ls.go

@@ -19,6 +19,15 @@ var commandDefintion = &cobra.Command{
 	Long: `
 Lists the objects in the source path to standard output in a human
 readable format with size and path. Recurses by default.
+
+Eg
+
+    $ rclone ls swift:bucket
+        60295 bevajer5jef
+        90613 canole
+        94467 diwogej7
+        37600 fubuwic
+
 ` + lshelp.Help,
 	Run: func(command *cobra.Command, args []string) {
 		cmd.CheckArgs(1, 1, command, args)