add Travis release settings

.travis.yml

@@ -26,3 +26,15 @@ after_success:
 notifications:
   email:
     - neville@spotify.com
+
+before_deploy: sbt ++$TRAVIS_SCALA_VERSION clean assembly
+deploy:
+  provider: releases
+  api_key:
+    secure: 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
+  file_glob: true
+  file: "target/scala-*/ratatool-*.jar"
+  skip_cleanup: true
+  on:
+    scala: 2.11.8
+    tags: true