Add Sentinel-2 imagery and OpenStreetMap maps from EOX IT Services GmbH

[emxsys]

Sentinel-2 cloudless by EOX IT Services GmbH is licensed under a Creative Commons Attribution 4.0 International License.

"Feel free to use the provided service endpoints (WMTS or WMS) directly in your application.
...
You are free to use Sentinel-2 cloudless for commercial and non-commercial purposes, as long as you provide proper attribution. It shall be displayed legibly and in proximity to the usage and read "Sentinel-2 cloudless - https://s2maps.eu by EOX IT Services GmbH (Contains modified Copernicus Sentinel data 2016 & 2017)". It shall include the links as given here in on-line usage."

• See: https://s2maps.eu
• WMS: https://tiles.maps.eox.at/wms?service=wms&request=getcapabilities
• WMTS: https://tiles.maps.eox.at/wmts/1.0.0/WMTSCapabilities.xml