Patch many doesn't return patched items when the query includes patched fields

Example:

``` js
app.service('/todos').create({text: "Test todo", complete: false}).then(() => {
  // Mark all incomplete todo's as done
  return app.service('/todos').patch(null, {complete: true}, {
    query: {
      complete: false
    }
  })
}).then(updated => {
  console.log(updated) // returns []
})
```
