Add Gemfile.base-versions for Travis

.gitignore

@@ -11,5 +11,5 @@ capybara-*.html
 .yardoc
 doc
 .bundle
-Gemfile.lock
+Gemfile*.lock
 chromedriver.log

.travis.yml

@@ -6,6 +6,9 @@ rvm:
  - ree
  - jruby
  - rbx-18mode
+gemfile:
+ - Gemfile
+ - gemfiles/Gemfile.base-versions
 before_script:
  - 'sh -e /etc/init.d/xvfb start'
 before_install:

gemfiles/Gemfile.base-versions

@@ -0,0 +1,14 @@
+source :rubygems
+
+gem 'bundler', '~> 1.0'
+gemspec :path => '..'
+
+gem 'xpath', :path => '../xpath'
+
+gem 'rack', '= 1.3.0' # cannot go lower because referer tests need aa7ce77cd0
+gem 'rack-test', '= 0.5.4'
+gem 'nokogiri', '= 1.3.3'
+gem 'rspec', '= 2.2.0'
+gem 'cucumber', '= 0.10.5'
+# We cannot test against older versions of selenium-webdriver without
+# installing older compatible Firefox versions.