Palantir fixes

1) Both NerbyQuests and QuestsDetails API moved to Palantir controller
2) Changed response schema: 'location_x' -> 'latitude' abd 'location_y' -> 'longitude'
3) NearbyPOISearchService: perform search only inside current wikia
After one of discussions with @SebastianMarzjan inside one of previous pull-requests - I was suggested to have these methods, as they providing an ability to inject different implementations of services.