Change PAYLOAD input to STDIN (#111)

* change to iron-io/runner dependency
* Fix runner dependency
* Change PAYLOAD input to STDIN, fixes #40

api/runner/runner.go

@@ -29,6 +29,7 @@ type Config struct {
 	AppName string
 	Memory  uint64
 	Env     map[string]string
+	Input   io.Reader
 	Stdout  io.Writer
 	Stderr  io.Writer
 }

api/runner/task.go

@@ -21,6 +21,9 @@ func (t *containerTask) Command() string { return "" }
 func (t *containerTask) EnvVars() map[string]string {
 	return t.cfg.Env
 }
+func (t *containerTask) Input() io.Reader {
+	return t.cfg.Input
+}
 
 func (t *containerTask) Labels() map[string]string {
 	return map[string]string{