Guild support

Making a new issue for guild support as the previous branch was deleted with the update to the branching model.

Tome should be able to provide the same functionality for guilds with a name override, a description field and possibly even a flag to indicate their RP style. (E.g light, medium or heavy)

Interface concepts available at: https://docs.google.com/drawings/d/1Zbeh4YW7DzEaH_Y6kxIlLw6jHHCSnaa_8b0aeeJVeCg