attempt to run rails 5

Author: JonRowe

.travis.yml

@@ -52,6 +52,10 @@ env:
   - RAILS_VERSION='~> 3.0.20'
 
 matrix:
+  include:
+    # Rails 5.x only supports 2.2
+    - rvm: 2.2
+    - env: RAILS_VERSION=master
   exclude:
     # 3.0.x is not supported on MRI 2.0+
     - rvm: 2.0.0