Discord.js Migration

This migrates the underlying framework to utilize Discord.js. In this release, many new features are now supported:

• Text: DM Channel, Group DM Channel, Guild Text Message
• Voice: Audio Playback and Joining Audio Channels
• Embedded Messages: Visually rich messages
• File attachments: Attach files to be downloaded by receiver
• Various Notifications: Presences, Guild Member Add/Remove/Update, Guild Role Changes, Channel Add/Delete/Create