vesln/params — pull request #3 by johanneswuerbach (2014-10-28 00:50:27+00:00)
Title: Exclude undefined keys

Today params creates undefined attributes for each whitelisted value.

```js
actual = params({ foo: 'bar', baz: 'zo', cl: 'fn' }).only('foo', 'baz', 'not_defined');
{ foo: 'bar', baz: 'zo', not_defined: undefined }
```

This breaks our filtering as not send values are now present as undefined.