Set default rake task to "generate"
Add out-of-date include
Fix pages that duplicate (old) untranslated en content

Remove mirrored, untranslated (out-dated) en content from translated
pages and add "out-of-date" include, which links to the current en page.
Merge pull request #679 from stomar/out-of-date

Remove untranslated content from translated pages
Merge pull request #678 from stomar/rake-default-task

Set default rake task to "generate"
Add post: RubyConf Taiwan 2014 registration now open.
Merge pull request #682 from JuanitoFatas/rubyconf-tw-cfp

Add post: RubyConf Taiwan 2014 registration now open.
Add missing html tag in index.html
Unify indentation in index.html