Towns and Roleplay format integration

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When AtherysTowns and AtherysChat are both on the server, allow the %nation variable to be used in chat formats. This variable will display the name of the speaker's nation.
Use case - Allows more information to be shown for certain chats while using AtherysTowns.
Example:

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When AtherysRoleplay and AtherysChat are both on the server, allow the %rpname variable to be used in chat formats. This variable will display the name of the speaker's roleplay card name. If none is set, default to displaying the player's username.