Add 2 new exports: get Guild by role ID and Role name from role ID

[coleminer0112]

We had a few use cases for these functions come up, so https://github.com/R3site created these, and I applied some modifications so they'd be suitable for general use.

Usage:

• exports['Badger_Discord_API']:FindGuildForRole(roleId): returns guild ID of the guild which has the provided role (if one exists).
• exports['Badger_Discord_API']:RoleNameFromId(roleid,guild): returns the role name of given role ID. The guild argument is optional and if not included will use FindGuildForRole to seek that role name.