This PR adds the class DQ_FreeFlyingRobot()

[juanjqo]

This PR adds the bindings for the DQ_FreeFlyingRobot() class added in cpp#58.

Example of usage:

from dqrobotics import *
from dqrobotics.robot_modeling import DQ_FreeFlyingRobot

robot = DQ_FreeFlyingRobot()
x = DQ([1,0,0,0,0,0,0,0])
x = robot.fkm(x)
J = robot.pose_jacobian(x)
J_dot = robot.pose_jacobian_derivative(x)

Best regards,

Juancho

[mmmarinho]

Waiting on dqrobotics/cpp#58