Added web manifest for nice icon and easy add to homescreen!

https://xoxowhatsnext.glitch.me

#xoxo2018 #XOXOfest
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Made a little countdown page for whatever is next up in the schedule at #xoxo2018.

https://xoxowhatsnext.glitch.me

(with @glitch of course ♥️)
https://twitter.com/dietrich/status/1037780634159087616