Updated the axel distance and wheel distance values to make them closer to the real values.

See merge request !1

Added support for the asymmetric mapping of the steering angle.

Merge branch 'master' of https://gitlab.iri.upc.edu/mobile_robotics/adc/platform/model_car/simulator/iri_model_car_controller

Merge branch 'master' of https://gitlab.iri.upc.edu/mobile_robotics/adc/platform/model_car/simulator/iri_model_car_controller

Modified the generation of the encoder information. The encoder count is the absolute displacement (both positive and hegative) and the forward flag indicates the direction of the motion.

Used the [-100,100] range for the speed and steer angle control signals (like the real robot).

They can be configures using the YAML file.

Merge branch 'master' of ssh://gitlab.iri.upc.edu:2202/mobile_robotics/adc/simulator/model_car_controller

Solved a bug in the computation of the steering angles.

Updated seat_car_controller steering and steering angle message types, to match model_car (odometry) packages last version (v3.1)

seat_car_controller: modified to match last version of odometry node (v3.1 amd64 debs): steering_angle type changed from Int16 to UInt8, and imu yaw expected in rads instead of degrees

Added the new topics (steering_angle).
Changes to approach the simulated outputs to the real ones.

Updated package.xml files: license, mantainers and authors

Added the three model coefficients to the seat_car_control package configuration file.

seat_car_controller: added k=0.5 conversion from steering servo to steering wheels angle. To be replaced by a table/function