Some file-local classes were exposed; moved to anonymous namespace.
Some file-local classes were exposed; moved to anonymous namespace.

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