Allowed for posting of articles

A visitor to the site can add an article with a required title field and a URL and/or content field. Currently very basic (read: ugly) and can allow the posting of an "article" with only a title and no URL or content.
Somewhat related, but I shared these alternative form libraries with @pk-nb and thought I'd post them here for you to check out as well: [simple_form](https://github.com/plataformatec/simple_form) and [formtastic](https://github.com/justinfrench/formtastic).