Add IRC notifications and allow 1.8.7 to fail

This should tell travis to run the tests against 1.8.7 but not to
consider the whole build broken if it fails (which it currently does)

Author: egypt

.travis.yml

@@ -1,4 +1,12 @@
 language: ruby
 rvm:
-#  - '1.8.7'
+  - '1.8.7'
   - '1.9.3'
+
+matrix:
+  allow_failures:
+    - rvm: '1.8.7'
+
+notifications:
+  irc: "irc.freenode.org#msfnotify"
+