Add support for more options

`options.options` might be a bit confusing but it would look like this:

```js
pygmentize({ lang: 'js', format: 'html', options: { startinline: 1, linenos: 1 } }, 'var a = "b";', function (err, result) {
  console.log(result.toString())
})
```

Which makes sense since it matches up with how you'd call pygments from the command line.