Implement chat and messages serverside.

[cnelsonsic]

The basescript can create messages in the database, but there is no way for clients to get at them.

This needs the MessageHandler implemented to return queried messages since a datetime, like the ObjectsHandler.

There are two types of messages:

• Intra-Zone messages, messages that are only inside of the zone. Usually sent by mobs. (DONE in 5c2eb76)
• Game-wide messages, messages that are sent to a target regardless of location in world. These are private messages by players, usually.