NanoUI PDA

Messenging cleaned up

Atmospheric scans added

Crew manifest added and a new proc added
/obj/effect/datacore/proc/get_manifest_json()

To build the manifest into the list the JSON writer likes as well as sort the manifest so heads of departments are at the top of the list.

Removed the "ADD ALL THE VARS" from pda, there are very few variables we need from the PDA and it's a waste of time to do it.