oamc: Rough addr:place= tag support. 

This simply uses the value of the addr:place tag if addr:street is
not present.  Since OsmAnd doesn't associate the address streetnames
with actual streets in the data (unlike Nominatim), the streetname
is simply a string used in address search.  So using the place name
instead still works fine.
They are excluded for consistency with CityType.DISTRICT.  Maybe it's useful to search for them... I only excluded SUBURB and NEIGHBOURHOOD because they are much like district in that they're not autonomous localities (according to the wiki), usually not part of a postal address.