Add attribution to Hashrocket

README.rdoc

@@ -124,3 +124,14 @@ Note: Any field that is supported by the Pivotal Tracker API should work within
 Credit - Wes Gibbs (https://github.com/wesgibbs) thought of and wrote Slurper as a
 Ruby script. It was later packaged and released as a gem by his fellow
 Rocketeers after using it and finding it extremely handy.
+
+---
+
+### About
+
+[![Hashrocket logo](https://hashrocket.com/hashrocket_logo.svg)](https://hashrocket.com)
+
+Slurper is supported by the team at [Hashrocket, a
+multidisciplinary design and development consultancy](https://hashrocket.com). If you'd like to [work with
+us](https://hashrocket.com/contact-us/hire-us) or [join our
+team](https://hashrocket.com/contact-us/jobs), don't hesitate to get in touch.