Add README file with notes on modifying Bullet code when embedding in Chrono
Add README file with notes on modifying Bullet code when embedding in Chrono

dariomangoni/chrono,rserban/chrono,projectchrono/chrono,dariomangoni/chrono,rserban/chrono,dariomangoni/chrono,rserban/chrono,projectchrono/chrono,rserban/chrono,rserban/chrono,projectchrono/chrono,rserban/chrono,projectchrono/chrono,projectchrono/chrono,dariomangoni/chrono,rserban/chrono,dariomangoni/chrono,projectchrono/chrono,dariomangoni/chrono