Implements a basic message queue.
Implements second revision of the message queue.
Implements toString for Bag.
Implements death message concrete class.
Adds logging of random seed.
Adds addition jets for testing.
Implements tracking of all jet entities in JetSystem.
Implements death messages via the message queue.
Updates client and server to compile with message queue changes.
Updates unit tests after integration of message queue.
Merge pull request #75 from absolom/msg

Pull Request - Message Queue

Closes #74.