Small updates
Merge branch 'master' of https://github.com/selig/qea.git

Conflicts:
	code/qea/src/structure/impl/SimpleDetQEA.java
	code/qea/src/structure/impl/SimpleNonDetQEA.java
Added AuctionBidding as an example. To do this I also added
- Guard factory methods
- Assignment factory methods
- Binding helper methods (including copy)
More of these will be added in the future.

I've implemented two simple tests for AuctionBidding, which currently
fail. Feel free to add more tests.
Added non-deterministic version of Auction Bidding and extended tests.
Again, you may want to add additional tests.