rbKarel - build dynamic help of available Script commands using attributes

```
Idea that just occurred to me whilst writing a related feature reques to Real -
if I put brief help into
an attribute on a method then I can use Introspection to iterate that class and
generate a help page
for all the commands I intend making available to the script, skipping the
public methods which it is
not intended the user invoke through scripts.
```

Original issue reported on code.google.com by `dentaroo@gmail.com` on 1 May 2009 at 12:12