Add sponsorship badge

Author: bronzdoc

README.md

@@ -191,3 +191,9 @@ To install this gem onto your local machine, run `bundle exec rake install`. To
 ## Contributing
 
 Bug reports and pull requests are welcome on GitHub at https://github.com/fastruby/skunk/issues.
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+## FastRuby.io
+
+![fastruby](https://github.com/fastruby/skunk/raw/master/fastruby-logo.png)
+
+`skunk` is maintained and funded by FastRuby.io, inc. The names and logos for FastRuby.io are trademarks of FastRuby.io, inc.