StateManager
 - Combined several signals related to the DeclarationPhase.
GameManager
 - Combined signals ralated to the Declaration Phase.
CardManager
 - Added a CheckSelection function.
DeclarationPhase
 - Combined signals.
 - Added Slot function to emit a ValidSelection signal.
CardArray
 - Updated for Declaration Phase.
Initial commit of new class AI.
AI
 - Add a stub for Initialize.
GameManager
 - Add a member object for the AI.
DeclarationPhase
 - Clean up invalid signal name.