Update call the map constructor

The geo.map constructor now takes a single argument.
Update map creation to use new API
Increase z-index of control divs

Increase z-index so they appear on top of the map.
Update OSM layer creation to new API
Update API calls to get access to interactorStyle
Update region selection calls the match new geojs API
Pass event to getBoundingBox(...)
Add floodLayer and floodLayerSource from GeoJS

These are application specific and belong here
Remote floodLayerSource and combine with floodLayer
Rename archive => floodmap
Add floodLayer.js to index.html
Correct index for lat/long array access
Remove references to floodLayerSource
Rename floodLayer => layer
Fix up GeoJSON
Use GeoJS's GeoJSON reader
Update calls to get zoom level
displayToMap => displayToGcs
Update access to interactor
Remove unused code