Update to fix `rake aborted`

When I try and run the rake script, without `passive = true` it fails with:

``` bash
rake aborted!
end of file reached
```

Best,
Seve

Also: from a quick look at the standard lib ftp#getbinaryfile looks to call close automatically so I'm not sure the call is explicitly needed.
Merge pull request #1 from tehprofessor/patch-1

Update to fix `rake aborted`