Create Connection Adapaters

[JenkinsDev]

Why have JenkiesBot just be a discord bot? Let's create connection adapters for any chat systems we want the bot to be able to connect to.

• Create module for connection adapters.
• Create connection adapter for Discord
• Create connection adapter for Slack

Ideas for adapters at a later point.

• Create connection adapter for Curse (Got a response back, no public API yet but they are working on it!)
• Create connection adapter for Facebook Messenger (Possibility, no promises. https://developers.facebook.com/blog/post/2016/04/12/bots-for-messenger/)

[JenkinsDev]

Will be mainly worked on in the enhance/add_connection_adapters branch