Bump up Rails patch versions, add Rails 4.1, add to .travis.yml

1. Added gemfile for Rails 4.1
2. Added the Rails 4.1 under suitable VMs to the .travis.yml
3. Bumped up the RSpec version to 2.14.x
4. Bumped up the Rails patch version.

I'm getting a test failure with Rails 4.1 that appears to be legitimate.  Can someone with more knowledge of the JSON handling in the gem take a look?