Update POWERED-BY.md

mumrah · mumrah · commit 8cc4666f0746 · 2013-10-02T16:15:06.000-04:00
Apparently GitHub flavored markdown doesn't fully work in md files? (@mumrah didn't auto-link)
diff --git a/POWERED-BY.md b/POWERED-BY.md
@@ -3,4 +3,4 @@
 If you're using this library and care to give us a shout out, please fork the project,
 add yourself here, and submit a pull request. Thanks!
 
-* @mumrah, adding myself as an example
+* [@mumrah](https://github.com/mumrah), adding myself as an example
