Update README.md

Author: danburzo

README.md

@@ -1,4 +1,7 @@
 pubsub
 ======
 
-A small JavaScript library that implements the Publish/Subscribe (Mediator) pattern. Engineered for performance.
+`pubsub` is a small JavaScript library that implements the Publish/Subscribe (Mediator) pattern:
+http://en.wikipedia.org/wiki/Publish%E2%80%93subscribe_pattern
+
+Engineered for performance. Forked from AppSeeds: http://github.com/danburzo/appseeds