Provide and output proper existing error message
Provide and output proper existing error message

If the found plugin / package does not fulfill some specs (i.e. does not contain the keyword `homebridge-plugin`), it will be rejected with an error. Without that change nobody will be notified WHY the plugin has been rejected/skipped.
felixekman/homebridge,nfarina/homebridge,hplato/homebridge,snowdd1/homebridge,nfarina/homebridge,chrisi21/homebridge,inonprince/homebridge,EddyK69/homebridge