Option to remain in foreground

```
It's sometimes useful to have sreadahead stay in the foreground.  I've
committed the following patch to my fixes branch:

http://bazaar.launchpad.net/~scott/sreadahead/fixes/revision/35
```

Original issue reported on code.google.com by `key...@gmail.com` on 20 Jul 2009 at 3:47
