add installation instructions to readme for slack and discord

[JustinGOSSES]

add installation instructions to readme for slack and discord

Hello!

If you’re still interested, I’m planning on opening a PR soon with the information and also updates to the code.

[JustinGOSSES]

Still interested @justinzelinsky

@jhonatantft do you want to follow up on your previous pull request with some help here as well?

[jhonatantft]

Yes @JustinGOSSES, I'll help here.

I was working on updating the bots but it became a bit more of a chore than I intended :) I'll keep at it and keep everyone posted.

[jhonatantft]

@JustinGOSSES I just realized that the steps to run the application is not working. There are no astroBot.js anymore. I suggest a code refactoring and lib updates as well. Node version being used is 0.12.x, which could be at least 8.x^. What are your thoughts?