.travis.yml in imap-backup-1.0.14 vs .travis.yml in imap-backup-1.0.15

@@ -1,6 +1,9 @@
 language: ruby
 rvm:
   - 1.9.3
   - 2.0.0
   - 2.1.1
+branches:
+  only:
+    - master
 script: "bundle exec rake spec"