Added rack dependency.

git-svn-id: https://google-api-ruby-client.googlecode.com/svn/trunk@72 c1d61fac-ed7f-fcc1-18f7-ff78120a04ef

tasks/gem.rake

@@ -25,6 +25,7 @@ namespace :gem do
     s.add_runtime_dependency('json', '>= 1.1.9')
     s.add_runtime_dependency('extlib', '>= 0.9.15')
 
+    s.add_development_dependency('rack', '= 1.2.0')
     s.add_development_dependency('rake', '>= 0.7.3')
     s.add_development_dependency('rspec', '~> 1.2.9')
     s.add_development_dependency('launchy', '>= 0.3.2')