Changed version number to 2.1.
Changed version number to 2.1.

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