Add /banano.json

[stjet]

Hello! I am making a browser extension that lets users tip Banano to the website! It's fairly simple to participate, all you need to do is add banano.json to the root (monkeytalks.cc/banano.json). The file should be formatted like this:

{"author":"","description":"","suggested_donation":"","address": ""} (suggested_donation is recommended to be a whole number but it doesn't have to be)

If your not interested, feel free to close the issue and ignore. Also, if you want me to do a PR I can try.