Minor doc tweaks.
Add ContinuousGame type class.
About to port match game.
Refactor dollar auction.
Ported match game.
Comment tweaks for Haddock.
About to port p-Beauty Contest.
Add simultaneous games as generalization of normal form.
Simplified IsNormal IsSimultaneous type classes.
Add validation to simultaneous games.
Back to multi-param type class for IsNormal and IsSimultaneous.
Added p-Beauty Contest.
Fix URLs for Haddock.