Have travis notify IRC when build fails

.travis.yml

@@ -5,3 +5,10 @@ compiler:
 # Change this to your needs
 sudo: false
 script: ./configure && make && make check
+
+notifications:
+  irc:
+    channels:
+      - "chat.freenode.net#nmap"
+    on_success: change
+    on_failure: always