Archive of read stories

This completes issue #43 - view archived stories.

As mentioned, this pull request:

* Ads a new page, `/archive`, which contains all read stories.
* Adds pagination to the new `/archive` page
* Adds a new button to the two button partials
* Localizes all the added text for English
* Fixed a test that I broke with these changes

Known problems:

* Tutorial still needs to be updated
* Localized text for other languages that are not English are missing
* There aren't tests for the new page.