[Quadcopter Project ] equation of angular position equation is wrongly given in physics_sim.py

[Vivekkmr91]

equation of angular position equation is wrongly given in physics_sim.py: It is given as angles = self.pose[3:] + self.angular_v self.dt + 0.5 self.angular_accels self.angular_accels self.dt However it should be angles = self.pose[3:] + self.angular_v self.dt + 0.5 self.angular_accels * self.dt**2

[lcrucks]

Internal ticket: https://udacity.atlassian.net/browse/MLND-1309

[lcrucks]

Fixed