.travis.yml in restfulness-0.3.2 vs .travis.yml in restfulness-0.3.3

@@ -1,9 +1,10 @@
 language: ruby
 rvm:
+  - 2.3.0
+  - 2.2.2
+  - 2.1.5
   - 2.0.0
-  - 1.9.3
   - jruby-19mode # JRuby in 1.9 mode
-  - rbx # Probably a bit optimistic
-matrix:
-  allow_failures:
-    - rvm: rbx
+  - rbx
+before_install:
+  - gem install bundler