Added to README mention of setup.cfg.
Added to README mention of setup.cfg.

arlenesr28/pystache,rismalrv/pystache,arlenesr28/pystache,rismalrv/pystache,beni55/pystache,jrnold/pystache,harsh00008/pystache,jrnold/pystache,charbeljc/pystache,defunkt/pystache,harsh00008/pystache,nitish116/pystache,arlenesr28/pystache,harsh00008/pystache,charbeljc/pystache,beni55/pystache,rismalrv/pystache,nitish116/pystache,nitish116/pystache