Golint (#548)

* linter fixes

* Golint and format code

* fmt

middleware/rewrite/name.go

@@ -13,7 +13,7 @@ type NameRule struct {
 	From, To string
 }
 
-// Initializer
+// New initializes a new rule.
 func (rule NameRule) New(args ...string) Rule {
 	from, to := args[0], strings.Join(args[1:], " ")
 	return &NameRule{middleware.Name(from).Normalize(), middleware.Name(to).Normalize()}