Add an example of 2D collision shapes - a half coin falling in a concave half circle
Add an example of 2D collision shapes - a half coin falling in a concave half circle

dariomangoni/chrono,rserban/chrono,Bryan-Peterson/chrono,andrewseidl/chrono,armanpazouki/chrono,tjolsen/chrono,Milad-Rakhsha/chrono,tjolsen/chrono,dariomangoni/chrono,amelmquist/chrono,dariomangoni/chrono,rserban/chrono,rserban/chrono,jcmadsen/chrono,Milad-Rakhsha/chrono,projectchrono/chrono,rserban/chrono,rserban/chrono,Milad-Rakhsha/chrono,armanpazouki/chrono,amelmquist/chrono,rserban/chrono,jcmadsen/chrono,jcmadsen/chrono,projectchrono/chrono,armanpazouki/chrono,amelmquist/chrono,tjolsen/chrono,dariomangoni/chrono,amelmquist/chrono,projectchrono/chrono,andrewseidl/chrono,armanpazouki/chrono,projectchrono/chrono,Bryan-Peterson/chrono,Milad-Rakhsha/chrono,jcmadsen/chrono,Milad-Rakhsha/chrono,amelmquist/chrono,projectchrono/chrono,jcmadsen/chrono,jcmadsen/chrono,tjolsen/chrono,rserban/chrono,andrewseidl/chrono,Bryan-Peterson/chrono,jcmadsen/chrono,andrewseidl/chrono,Milad-Rakhsha/chrono,projectchrono/chrono,amelmquist/chrono,dariomangoni/chrono,armanpazouki/chrono,Bryan-Peterson/chrono,dariomangoni/chrono,tjolsen/chrono,armanpazouki/chrono,Bryan-Peterson/chrono,andrewseidl/chrono