.travis.yml in verdict-0.4.1 vs .travis.yml in verdict-0.5.0

@@ -1,5 +1,7 @@
 language: ruby
+cache: bundler
+before_install: gem update bundler
 script: bundle exec rake
 rvm:
   - 1.9.3
   - 2.0.0
   - 2.1.1