Update sounding schema.

Remove uneeded require.
Add index to time and geospatial index on location.
Reorganizing server to fit cluster model.
Add Leaflet.js mapping lib.
MapView placeholder. No MVC elements yet.
Add default and min map heights.
Add map to step 1 of prediction.
Add hybrid layer to map.
Merge branch 'leaflet' into develop

Map placeholder. No MVC implementation yet.