Intgrate magma-chat with slack

[AbrahamAlexis]

Integrate magma-chat bots as a slack user. Make it possible to integrate different bots as diferrent users to slack. Create a command to change the current bot you are talking to within the conversation. Create an option for integrating a bot which shares it's memory between conversations with multiple users

[obie]

Closing since this should be implement at later date as a tool plugin gem.