Agent Definition: https://docs.google.com/document/d/1VdCBTJWPleESGX3pwQshO6ONvpO0OcTGp3g5VaqGn1c/edit
Unit Tests: TBA
Human Agent: A human can act as an agent by manually calling buy/sell functions when they see a change in stock value that would warrant a purchase or sale.
Sensor/Actuator Locations: TBA