remove 0.4 testing for now since it hangs and add IRC notifications

.travis.yml

@@ -1,9 +1,8 @@
 language: node_js
 node_js:
-  - 0.4
   - 0.6
   - 0.7 # development version of 0.8, may be unstable
 script: "./run_tests.sh"
 notifications:
-  email:
-    - d@unwiredcouch.com
+  irc:
+    - "irc.freenode.org#statsd"