Missing elements on map (tanks, reservoirs, pumps and valves)

[lbutler]

These elements are missing from the map as they are not described in the mapstyles.

All elements from EPANET should be shown on the map, and it should also be possible to see differences in their styles based on their attributes or current status or results.

This project is in need of a large refactor, and this will be a key component, I will create a separate project within this repo to cover all changes needed.