Created implementations of AgentPairer. Removed deprecated
AgentContainer constructors.
Created new AgentInteractor and marked old ones as deprecated.
Implemented StaticAgentPairer.
Corrected mistake in interact() method in AgentInteractor - added object
as a parameter.
Implemented interact() method in LanguageGameInteractor. Removed
deprecated interactors.
Corrected implementation of StaticAgentPairer.
Implemented RandomAgentPairer.