Adding problems to be solved.
replaced all ocurrences from auctioneer instanciation to a setUp test method
Using the @before and @after to test idempotence.
Added a new problem to be solved.
Created an AuctionBuilder, the first step in the refactoring to have it in one place.
did an inline refactor, and now i'm replying all occurrences by AuctionBuilder
finished refactoring, removed dependencies with Bids, also defined one single place to create Auction fixtures.
Merge pull request #6 from helmedeiros/TakingCareOfMyTests

Taking care of my tests was finished with some refactoring strategies to keep it as clean as our domain classes