Configure travis slack integration (#478)

Added via `travis encrypt`.

Big diff.  Apparently I'm bad at yaml.

.travis.yml

@@ -1,9 +1,6 @@
----
 language: node_js
-
 node_js:
- - "stable"
-
+- stable
 cache:
   directories:
   - node_modules
@@ -20,18 +17,18 @@ cache:
   - packages/react-server-module-tagger/node_modules
   - packages/react-server-test-pages/node_modules
   - packages/react-server-website/node_modules
-
 env:
-  - CXX=g++-4.8
+- CXX=g++-4.8
 addons:
   apt:
     sources:
-      - ubuntu-toolchain-r-test
+    - ubuntu-toolchain-r-test
     packages:
-      - g++-4.8
-
+    - g++-4.8
 before_script:
-  - npm run bootstrap-no-i
-
+- npm run bootstrap-no-i
 after_failure:
-  - npm run debug
+- npm run debug
+notifications:
+  slack:
+    secure: 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