README : mention du message d'aide

README.md

@@ -116,3 +116,11 @@ You can also list all available virtual machines by running this command:
 ```sh
 qemush ls
 ```
+
+### Other uses
+
+You can show the full list of possible actions by running this command:
+
+```sh
+qemush help
+```

bin/qemush

@@ -46,7 +46,7 @@ ${name}: usage:
   ${name} diskrm <disk name>               - delete disk image
   ${name} shell                            - start a shell as user qemu
   ${name} help                             - show this help
-  ${name} add <path to script>        - add a launching script from this PATH
+  ${name} add <path to script> [<VM name>] - add a launching script
 EOF
 }