Add a goodfirstissue bot

[technosophos]

@rajatjindal mentioned setting up a goodfirstissue bot. He pointed to these: https://github.com/rajatjindal/goodfirstissue, https://github.com/apps/goodfirstissue and https://twitter.com/goodfirstissue

I created the label, but we would also need to set up a bot.

[rajatjindal]

thanks for considering. the installation is really straight forward and can be enabled at org/repo level. i am happy to answer any questions/concerns.

[rajatjindal]

Hi @technosophos

did we make a decision on if we should (or shouldn't) install this bot.