Except as provided in Section 1.1, the compensation herein provided for shall be the full, complete and only measure of the liability of the employer bound by election under this Act and such employer’s liability for compensation and medical benefits under this Act shall be exclusive and in place of any and all other civil liability whatsoever, at common law or otherwise, to any employee or his legal representative on account of damage, disability or death caused or contributed to by any disease contracted or sustained in the course of the employment.