sanger/sequencescape — pull request #376 by maxigit (2012-01-05 17:09:02+00:00)
Title: 22942787 fix negative quota

Fix 2 bugs resulting in negative quota.
The first is a bug in the quota_calculator, which wasn't booking enough quota for multliplexing pipelines.
The second is that deleting an order in the UI wasn't unbooking quota either.