Use all sass options

Looks like this API needs to be updated, but thought I'd do a PR because I needed the sass options anyway. No biggy if you don't want or are going to update API anyway and use sander.

I also created a gobble-sass-file for individual files like so:

```js
var sass = require('node-sass');

function sassFile(input, options) {
	options = options || {}
	options.data = input
	return sass.renderSync(options)
}

sassFile.defaults = {
	accept: ['.scss'],
	ext: '.css'
}

module.exports = sassFile
```

which is useful for component css