added Karlsruhe head model

data/RobotAPI/robots/Head/KA-Head.xml

data/RobotAPI/robots/Head/fullmodel/eye_l.iv

data/RobotAPI/robots/Head/fullmodel/eye_r.iv

data/RobotAPI/robots/Head/fullmodel/head.iv

data/RobotAPI/robots/Head/fullmodel/head_base.iv

data/RobotAPI/robots/Head/fullmodel/jaw.iv

data/RobotAPI/robots/Head/fullmodel/lid_l_bottom.iv

data/RobotAPI/robots/Head/fullmodel/lid_l_top.iv

data/RobotAPI/robots/Head/fullmodel/lid_r_bottom.iv

data/RobotAPI/robots/Head/fullmodel/lid_r_top.iv

data/RobotAPI/robots/Head/fullmodel/neck_pitch_link.iv

data/RobotAPI/robots/Head/fullmodel/neck_roll_link.iv

data/RobotAPI/robots/Head/fullmodel/neck_yaw_link.iv

data/RobotAPI/robots/Head/iv_primitives/cyl1.wrl

data/RobotAPI/robots/Head/iv_primitives/cyl2.wrl