Implements Vector::contains() method
Implements Vector::contains() method

The Vector::contains() method was not defined. This PR resolves that by
implementing the template method.

RichardRanft/Torque2D,chaigler/Torque2D,GarageGames/Torque2D,chaigler/Torque2D,dottools/Torque2D,greenfire27/Torque2D,RichardRanft/Torque2D,GarageGames/Torque2D,dottools/Torque2D,dottools/Torque2D,chaigler/Torque2D,greenfire27/Torque2D,RichardRanft/Torque2D,greenfire27/Torque2D,greenfire27/Torque2D,dottools/Torque2D,RichardRanft/Torque2D,RichardRanft/Torque2D,greenfire27/Torque2D,dottools/Torque2D,dottools/Torque2D,GarageGames/Torque2D,RichardRanft/Torque2D,GarageGames/Torque2D,greenfire27/Torque2D,chaigler/Torque2D,greenfire27/Torque2D,dottools/Torque2D,RichardRanft/Torque2D,dottools/Torque2D,chaigler/Torque2D,GarageGames/Torque2D,dottools/Torque2D,chaigler/Torque2D,GarageGames/Torque2D,dottools/Torque2D,GarageGames/Torque2D,greenfire27/Torque2D,chaigler/Torque2D,GarageGames/Torque2D,RichardRanft/Torque2D,RichardRanft/Torque2D,chaigler/Torque2D,GarageGames/Torque2D