add twitter account to readme

README.md

@@ -14,7 +14,8 @@ Please [visit the website](https://crafatar.com) for details.
 
 ## Contact
 
-You can [join us](https://webchat.esper.net/?channels=spongy) in #spongy on irc.esper.net.
+* You can follow us on [![t](https://favicons.githubusercontent.com/twitter.com)@crafatar](https://twitter.com/crafatar)
+* You can [join us](https://webchat.esper.net/?channels=spongy) in #spongy on irc.esper.net.
 
 ## Install