updated readme with proper usage of mpstatus
@@ -26,9 +26,10 @@ Should your run be interrupted for whatever reason, just run `multi-planet` agai
To check the status of your simulations, type
```
-mpstatus
+mpstatus <input file>
```
-in the directory that is currently running `multi-planet`. The following will be printed to the command line:
+where the "input file" **must be the same file** used with `vspace` and `multi-planet`.
+The following will be printed to the command line:
```
--Multi-Planet Status--
