Adding more tests for classification.
Adding more tests for classification.

- Checking that modifying an instance behaviour dictionary does not
  change the behaviour dictionary of the class
- Adding more tests to see effect of having multiple copies of a
  strategy with differing behaviour

risicle/Axelrod,mojones/Axelrod,kathryncrouch/Axelrod,emmagordon/Axelrod,bootandy/Axelrod,bootandy/Axelrod,mojones/Axelrod,risicle/Axelrod,uglyfruitcake/Axelrod,kathryncrouch/Axelrod,uglyfruitcake/Axelrod,emmagordon/Axelrod