Made the argument to pystache.command.render's main() function optional.
Made the argument to pystache.command.render's main() function optional.

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