added links to set the locale
internationalized views
added translations for post title and content
got globalize and friendly_id working together. locale stays after clicking a link.
scoped the locale param
fixed tag list and app only uses browser locale if it's en or de
added uniqueness validation of post titles
annotated models
added localization for post_form
fixed redirects for posts#new and posts#edit
Merge pull request #1 from coding-chimp/internationalization

Internationalization