Options position should be free

Now it can only:

```
node ./cli.js autolog ./source ./target --x-espect -r
```

These would be wrong:

```
node ./cli.js autolog --x-espect -r ./source ./target
node ./cli.js autolog  --x-espect ./source ./target -r
```

It should be as free as possible, at least as free as most of Unix commands.
