Deleted obsolete model code
Fixed minor compilation error caused by previous commit and spurious
java import of a deleted class
Deleted more obsolete and unused test model code.
Refactored iterated prisoner's dilemma to fit with ec.agency package
naming
AgencyEvaluator no longer calls super.setup(), as the ECJ "problem" and
master-slave system are no longer used.  Keeping this call requires
irrelevant configuration or ECJ will error on startup.
Removed calls to remote execution invocation system; prevents null
reference errors.
Refactored prisoners' dilemma game to work with agency systems better
Added BruteMemoryPrisoner and InterrogationStimulus