Add Rails 4.2.x compatibility
Add Rails 4.2.x compatibility

This fixes compatibility issues with Bullet on Rails 4.2.x

mattbrictson/xray-rails,brentd/xray-rails,mattbrictson/xray-rails,brentd/xray-rails,brentd/xray-rails,brentd/xray-rails,mattbrictson/xray-rails,mattbrictson/xray-rails