add support for recyclemanager.nl

[FreeFrags]

Please add support for recyclemanager.nl

Should be relatively easy it returns JSON:
https://vpn-wec-api.recyclemanager.nl/v2/calendars?postalcode=${postcode}&number=${housenumber}

[FreeFrags]

@apstemmer Hmm been checking every day for this to get merged into the master. Hope this is done soon otherwise ill have to install yet another package from a repo instead of the app store.

@robertraaijmakers Thank you very much for implementing this it is greatly appriciated!