Rendered field exported to support rendered requests on Do function. Data races fixed.

request.go

@@ -4,10 +4,9 @@ import (
 	"net/http"
 )
 
-// Request is a small wrapper around *http.Request that contains Metadata
+// Request is a small wrapper around *http.Request that contains Metadata and Rendering option
 type Request struct {
 	*http.Request
-	Meta map[string]interface{}
-
-	rendered bool
+	Meta     map[string]interface{}
+	Rendered bool
 }