[Tilesathome] POI layer?

[Dermot McNally]

The idea is sound, but the real question is whether what we need as
_a_ POI layer or several. Sometimes you want hotels, sometimes filling
stations, sometimes an ATM - you see what I mean. For slippy maps, the
ideal approach is probably one where you can enable or disable
categories of POI and they appear or disappear as appropriate.

This will either mean a lot of layering of map tiles (and a hell of a
lot of tile rendering to support it) or a live-from-DB approach, which
I can see being a challenge too.

BTW, I've noticed that hotel rendering seems to have been dropped in
osmarender5, is this another growing pain?

Dermot