Integrate geocoding

If location of task or event contains street address, it is possible to convert it into lat-long coordinates using some free geocoding server, such as https://nominatim.openstreetmap.org. See API description. Then one can leave only room number in the LOCATION field and use GEO field for navigation.

But we have to check whether tasks and Android calendar support GEO field when invoke navigator software.

It is even possible to use local copy of OSM data to search object. But I don't think that it is good idea for small calendar/tasklist utility.

Also geocoding can be used to filter tasks which should be done in particular place. Something like "within 5 km from my location".