More americanisation. Fixes #1 again

middleware_auth_key.go

@@ -48,7 +48,7 @@ func (k *AuthKey) ProcessRequest(w http.ResponseWriter, r *http.Request, configu
 			"origin": r.RemoteAddr,
 		}).Info("Attempted access with malformed header, no auth header found.")
 
-		return errors.New("Authorisation field missing"), 400
+		return errors.New("Authorization field missing"), 400
 	}
 
 	// Check if API key valid

middleware_basic_auth_check.go

@@ -36,7 +36,7 @@ func (k *BasicAuthKeyIsValid) ProcessRequest(w http.ResponseWriter, r *http.Requ
 		authReply := "Basic realm=\"" + k.TykMiddleware.Spec.Name + "\""
 
 		w.Header().Add("WWW-Authenticate", authReply)
-		return errors.New("Authorisation field missing"), 401
+		return errors.New("Authorization field missing"), 401
 	}
 
 	bits := strings.Split(authHeaderValue, " ")

middleware_check_HMAC_signature.go

@@ -31,9 +31,9 @@ func (hm *HMACMiddleware) authorizationError(w http.ResponseWriter, r *http.Requ
 	log.WithFields(logrus.Fields{
 		"path":   r.URL.Path,
 		"origin": r.RemoteAddr,
-	}).Info("Authorisation field missing or malformed")
+	}).Info("Authorization field missing or malformed")
 
-	return errors.New("Authorisation field missing, malformed or invalid"), 400
+	return errors.New("Authorization field missing, malformed or invalid"), 400
 }
 
 // New lets you do any initialisations for the object can be done here

middleware_oauth2_key_exists.go

@@ -35,7 +35,7 @@ func (k *Oauth2KeyExists) ProcessRequest(w http.ResponseWriter, r *http.Request,
 			"origin": r.RemoteAddr,
 		}).Info("Attempted access with malformed header, no auth header found.")
 
-		return errors.New("Authorisation field missing"), 400
+		return errors.New("Authorization field missing"), 400
 	}
 
 	if strings.ToLower(parts[0]) != "bearer" {