Regular API function

Description	Handles the dynamics functionality in a scene. This function is not available to add-ons.
C synopsis	simInt simHandleDynamics(simFloat deltaTime)
C parameters	deltaTime: the time that passed since the command was called last. Typically simGetSimulationTimeStep()
C return value	-1 if operation was not successful. 0 if the sepcified physics engine could not be found, otherwise, the number of calculation steps performed by the physics engine.
Lua synopsis	number result=sim.handleDynamics(number deltaTime)
Lua parameters	Similar to the C-function counterpart
Lua return values	Similar to the C-function counterpart