Incorrect "r" calculation in calculating drive velocities

[ericjunkins]

@Achllle, I believe that in the calculate drive velocities function in rover.py the "r" value used in v=r * omega is incorrect for the corners, lines 106, 107

vel_corner_closest = (radius - self.d1) * angular_velocity_center
vel_corner_farthest = (radius + self.d1) * angular_velocity_center

These should be the quadrature sum including the "self.d3" as well:

sqrt ((radius - d1) ^2 + (d3)^2 )
sqrt ((radius + d1) ^2 + (d3)^2 )

[Achille Verheye]

You are absolutely correct. I will fix this asap