rickharrison/broccoli-asset-rev — pull request #19 by kanongil (2014-08-05 13:13:51+00:00)
Title: Add hashFn option to specify custom hashing function

Using this option I'm able to replace the default hash with `sha1` hash using an option like:

```js
var tree = Fingerprint(..., {
...,
hashFn: function(buf) {
var shasum = crypto.createHash('sha1');
shasum.update(buf);
return shasum.digest('hex');
}
});
```

I also considered overloading the customHash option for this, but I was not in favor of that solution.