* Create a nwe AddressAndMapLocator which abstracts out the behavior of
selecting a location
* Fix the overlay causing render errors on the MapLocator by getting
rid of the overlay and just using a lock indicator
* Fix MapLocator zooming in to the wrong place by not framing the
markers
* Remove Latlng from platform and just use Location with optional
accuracy
* Use nested types with form-encoded POST
* Fix styles on water report page
This makes it possible to start hydrating the types into valid data
types like Dates which means I can get type safety guarantees when
displaying information.
