Add test suite for JavaScript

Can be run with `rake test_js`
JS: Story only calls methods on collection if present.
Run JavaScripts headless on travis
Start `rake test_js` as daemon
Move mark_all_as_read to under stories resource.
Merge branch 'master' of github.com:swanson/stringer
add some test for StoryView.
Merge branch 'pr/153'
Add javascript tests for rendering starred stories.
update localization files.