add notifications to travis config

.travis.yml

@@ -35,3 +35,9 @@ before_install:
   -in psiphon/controller_test.config.enc -out psiphon/controller_test.config -d
 - openssl aes-256-cbc -K $encrypted_sq6sgjwvsppj_key -iv $encrypted_sq6sgjwvsppj_iv
   -in psiphon/feedback_test.config.enc -out psiphon/feedback_test.config -d
+notifications:
+  slack:
+    rooms:
+      secure: jVo/BZ1iFtg4g5V+eNxETwXPnbhwVwGzN1vkHJnCLAhV/md3/uHGsZQIMfitqgrX/T+9JBVRbRezjBwfJHYLs40IJTCWt167Lz8R1NlazLyEpcGcdesG05cTl9oEcBb7X52kZt7r8ZIBwdB7W6U/E0/i41qKamiEJqISMsdOoFA=
+    on_success: always
+    on_failure: always