Use Rack Request to check proxy forwarded IPs
Require rack for Rack::Request
Add rack to Gemfile for test dependency
Merge pull request #264 from turbosquid/check_proxy_forwarded_ip

Use Rack Request to check proxy forwarded IPs
add rack to gemspec dependencies
add spec for X-Forwarded-For behaviour
add /vendor/gems to .gitignore
Merge branch 'master' of git://github.com/charliesome/better_errors