changing functions signature from void to bool.

IO/IODispatcher.cpp

Simulation.cpp

Simulation.h

events/EventManager.cpp

general/Macros.h

geometry/Building.cpp

geometry/Building.h

geometry/Goal.cpp

geometry/Goal.h

geometry/Obstacle.cpp

geometry/Obstacle.h

geometry/SubRoom.cpp

geometry/SubRoom.h

main.cpp

math/GCFMModel.cpp

math/GCFMModel.h

math/GompertzModel.cpp

math/GompertzModel.h

math/OperationalModel.h

pedestrian/Pedestrian.cpp