Users can upload new journalists

Trello: https://trello.com/c/v0ua84y2/88-enable-csv-journalist-uploads

![journalist-import](https://cloud.githubusercontent.com/assets/4560985/5345328/fa3a743a-7ee4-11e4-9e54-31143dfb1940.gif)

app/assets/javascripts files should not be prefixed with an underscore. SCSS files are prefixed with an underscore because, like Rails partials, `@import "my_scss_file"` looks for a file named `_my_scss_file.scss`. No such system exists for JS, so please remove the underscore.