Cleanup SI Unit classes and interface for REST responses; fixes to a few METAR parsing issues

app/Http/Resources/AcarsLog.php

@@ -2,12 +2,10 @@
 
 namespace App\Http\Resources;
 
-use Illuminate\Http\Resources\Json\Resource;
-
 /**
  * ACARS table but only include the fields for the routes
  * Class AcarsRoute
  */
-class AcarsLog extends Resource
+class AcarsLog extends Response
 {
 }