Fixing dependency issues.

git-svn-id: https://google-api-ruby-client.googlecode.com/svn/trunk@67 c1d61fac-ed7f-fcc1-18f7-ff78120a04ef

tasks/gem.rake

@@ -23,6 +23,7 @@ namespace :gem do
     s.add_runtime_dependency('addressable', '>= 2.2.2')
     s.add_runtime_dependency('httpadapter', '>= 0.2.0')
     s.add_runtime_dependency('json', '>= 1.1.9')
+    s.add_runtime_dependency('extlib', '>= 0.9.15')
 
     s.add_development_dependency('rake', '>= 0.7.3')
     s.add_development_dependency('rspec', '>= 1.0.8')