* [SC] Unified agent/thread deletion (also called: halt, exist, etc).
* [SC] Rewrote the agent property architecture to be more modular.
* [DH_AGENT,EXT] Return 404 if agent resource does not exist on server.
* [DH_MESSAGES,NEW] Added agent ask/command layer between DH and VOX_POPULI.
* [DH_POPULATION,NEW] Rewrote all population properties. Use agent properties as well.