Implement report_price method on fake auction
Extract private method for sending message in fake auction
Add test for bidding status
Skeleton spec and implementation for AuctionMessageTranslator
Upgrade to rspec 2.14.0rc1 so I can use spies
Add rspec to rakefile
Implement spec for message translator

It's a bit odd, because the Blather callback expects a block...

AuctionMessageTranslator is a module, and its `for` method returns a
lambda, which is called when a message is received.
Use AuctionMessageTranslator in Main