Modify README headings.
Modify README headings.

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