Allow logger to add transports (#2363)

- Move all of the winston logic from FileLoggerAdapter to WinstonLoggerAdapter
- Export WinstonLoggerAdapter so it can be sublcassed
- Expost the ability to add adittional transports to logger
- Import FirehoseLoggerAdapter alongside other adapters so it can be configured.

src/cli/cli-definitions.js

@@ -172,7 +172,7 @@ export default {
   },
   "customPages": {
     env: "PARSE_SERVER_CUSTOM_PAGES",
-    help: "custom pages for pasword validation and reset",
+    help: "custom pages for password validation and reset",
     action: objectParser
   },
   "maxUploadSize": {