Allow multiple vcc api keys (#85)

* Multiple vccapikeys function

* Reduce api calls for key checks

* Change sleeptime

* Optimize logging

* Format log datetime

* Change default conf

* Set device offline, if no working vcc api key can be found

* Fix climate scheduler

* Only redact sensitive data if debug is enabled

src/settings.json

@@ -12,7 +12,7 @@
     "username": "",
     "password": "",
     "vin": "",
-	"vccapikey": "",
+	"vccapikey": [],
     "odometerMultiplier": "",
     "averageSpeedDivider": "",
     "averageFuelConsumptionMultiplier": ""