Rack dependency fix for Travis

.gitignore

@@ -23,4 +23,6 @@ pkg
 .rvmrc
 
 ## PROJECT::SPECIFIC
-Gemfile.lock
+Gemfile.lock
+*.gem
+gemfiles/*.lock

Rakefile

@@ -1,11 +1,11 @@
 require 'rubygems'
 require 'rake'
-require 'bundler'
+require 'bundler/setup'
 
 require 'rspec/core/rake_task'
 desc "Run RSpec"
 RSpec::Core::RakeTask.new do |t|
   t.verbose = false
 end
 
-task :default => :spec
+task :default => :spec

gemfiles/Gemfile.rails-3.2.x

@@ -4,5 +4,8 @@ gem 'coveralls', :require => false
 gem 'simplecov', :require => false
 
 gem 'rails', '~> 3.2.22'
+if RUBY_VERSION < "2.2.0"
+  gem 'rack', '<= 1.6.0'
+end
 
 gemspec :path => '..'

gemfiles/Gemfile.rails-4.0.x

@@ -4,5 +4,8 @@ gem 'coveralls', :require => false
 gem 'simplecov', :require => false
 
 gem 'rails', '~> 4.0.0'
+if RUBY_VERSION < "2.2.0"
+  gem 'rack', '1.6.0'
+end
 
 gemspec :path => '..'

gemfiles/Gemfile.rails-4.1.x

@@ -4,5 +4,8 @@ gem 'coveralls', :require => false
 gem 'simplecov', :require => false
 
 gem 'rails', '~> 4.1.0'
+if RUBY_VERSION < "2.2.0"
+  gem 'rack', '1.6.0'
+end
 
 gemspec :path => '..'

gemfiles/Gemfile.rails-4.2.x

@@ -4,5 +4,8 @@ gem 'coveralls', :require => false
 gem 'simplecov', :require => false
 
 gem 'rails', '~> 4.2.0'
+if RUBY_VERSION < "2.2.0"
+  gem 'rack', '1.6.0'
+end
 
 gemspec :path => '..'