some refactoring of the zoom level handling. will make it easy and relatively friendly on the servers to boost the map detail level for given zoom levels
decrease standard refresh time to 30 seconds, so chat is more up to date
increase map tile cache to 2 minutes, so the increased refresh for chat does not impact map data tile requests
Merge branch 'master' of https://github.com/jonatkins/ingress-intel-total-conversion