Add authors and contributing instructions.
Add authors and contributing instructions.

PegasusWang/tornado-boilerplate,OlefirenkoK/tornado_base,OlefirenkoK/tornado_base,abhishekgahlot/tornado-boilerplate,OlefirenkoK/tornado_base,PegasusWang/tornado-boilerplate,bueda/tornado-boilerplate,tijmenNL/iptv-grabber