Improve demo: use Chrono data path, and refactor comments
Improve demo: use Chrono data path, and refactor comments

rserban/chrono,rserban/chrono,Milad-Rakhsha/chrono,Milad-Rakhsha/chrono,Milad-Rakhsha/chrono,armanpazouki/chrono,armanpazouki/chrono,armanpazouki/chrono,projectchrono/chrono,Milad-Rakhsha/chrono,dariomangoni/chrono,dariomangoni/chrono,projectchrono/chrono,dariomangoni/chrono,armanpazouki/chrono,projectchrono/chrono,projectchrono/chrono,rserban/chrono,projectchrono/chrono,dariomangoni/chrono,rserban/chrono,Milad-Rakhsha/chrono,rserban/chrono,projectchrono/chrono,dariomangoni/chrono,rserban/chrono,armanpazouki/chrono,armanpazouki/chrono,rserban/chrono,Milad-Rakhsha/chrono,dariomangoni/chrono