Prettify zone-displays

[gtfierro]

http://ciee.cal-sdb.org/dashboard/hvac/Server

This should look less like a table and more like an interface that someone would want to use. Issues with padding on the cells, and which metadata to display. We should use the human-readable names, but try to also give information about the device itself, rather than internal sMAP variables (e.g. Metadata/Device rather than Path)

@gtfierro will handle this, unless @thoyt has some ideas