Crash when running with --use_strict

Hi,
I run node with the `--use_strict` switch. This lib fails:

```
/Users/dev/work/node_modules/rconsole/rconsole.js:272
    Error.captureStackTrace(err, arguments.callee)
```

Because `arguments.callee` is not available in strict mode ([see here](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Functions/arguments/callee)).
