add templates/default/haproxy-default.erb to badly enable haproxy
the runit_service should expect the template from the runit_service cookbook
the template resource should assume the haproxy_lwrp cookbook
allow the lwrp to omit frontend, or backend and be configured only with the listen param
improve README
the listen resource could support the server array and easily configure only with the listen param
bump to 2.0.1