Made input function to CoordinateCoupler const.
Made input function to CoordinateCoupler const.

robojukie/simbody,elkingtonmcb/simbody,scamille/simbody,elkingtonmcb/simbody,Gjacquenot/simbody,simbody/simbody,Gjacquenot/simbody,chrisdembia/simbody,robojukie/simbody,scamille/simbody,elkingtonmcb/simbody,chrisdembia/simbody,Gjacquenot/simbody,simbody/simbody,scamille/simbody,robojukie/simbody,elen4/simbody,elen4/simbody,chrisdembia/simbody