* Add subtle border for age layer buildings
* Simplify map data queries
* Fix typo in updated construction layer query
* Enable data tile caching switch for development
* Enable turning tile cache off
* Use render time variables for highlight tiles
* Create building numbers map layer
* Create database view for simpler map queries
* Decrease min zoom for numbers layer
* Add building outlines to all map layers
* Adjust building numbers style and zoom level
* Revert "Create database view for simpler map queries"
This reverts commit e3c342cb7393f491c838df5654c2316a9dab08e1
which cannot be implemented before upgrading Postgres to min v11
The new method uses the composite() method of sharp
to reduce the number of times a PNG buffer is created.
The number could be further reduced from two to one,
if the issue #1908 from lovell/sharp is resolved so that
composite and resize can be chained without an
intermediate call to .png().toBuffer()
