update .travis.yml

.travis.yml

@@ -1,14 +1,16 @@
 language: ruby
 
+bundler_args: '' # avoid travis-ci to set deployment mode by default
+
 before_script: bundle install
 
 script: bundle exec rake spec
 
 matrix:
   include:
-    - rvm: 2.0.0
-      gemfile: gemfiles/rails4.gemfile
-    - rvm: 2.0.0
-      gemfile: gemfiles/rails32.gemfile
-    - rvm: 1.9.3
-      gemfile: gemfiles/rails31.gemfile
+    - gemfile: gemfiles/rails4.gemfile
+      rvm: 2.0.0
+    - gemfile: gemfiles/rails32.gemfile
+      rvm: 2.0.0
+    - gemfile: gemfiles/rails31.gemfile
+      rvm: 1.9.3