mattgreen/nitron — pull request #16 by macfanatic (2012-06-26 15:12:53+00:00)
Title: Added reorder() method, quick ordering change on a relation

Usage:

```ruby
scope = Consignment.order(:created_at) # ascending
scope.reorder(:created_at, ascending: false) #descending, overwrites any previous order declarations

# note that the following is different
scope.order(...).order(...) # this produces ordering by multiple descriptors
```