spree/spree — pull request #1549 by citrus (2012-05-17 14:38:14+00:00)
Title: Default Order adjustments to be ordered by created_at

I was noticing that the order adjustments seemed to be in a random sort-order in the mail views. This PR will sort adjustments by their `created_at` timestamp.

Thanks!

Examples:

*Email 1:*
```
Subtotal:	$280.00
Shipping:	$24.00
Promotion (10% off 12 or more):	-$28.00
Sales Tax 7.75%:	$21.70
```

*Email 2:*
```
Subtotal:	$260.00
Promotion (10% off 12 or more):	-$26.00
Sales Tax 7.75%:	$20.15
Shipping:	$24.00
```