WARDS: added ward layers
WARDS: added some color
CENTERS: added clustering plugin to reduce overlapping centers
CENTERS: fine tuning cluster radius
ICONS: created center vs inhome icons. replaced baby icon. next, need to differentiate based on bizType
URL HASH: added leaflet-hash plugin to update url as user browses map
ICONS: marker icons differentiate between centers & in-home child care, but they're all on the same layer.
LEGEND: added legend & made layers perminently visible