Add a whole bundle of new languages.

This adds all the languages listed in this pivotal story[1] other
than Bahasa and Dari, about which more clarification is needed.  The
native names of the language are all taken from wikipedia.

[1] https://www.pivotaltracker.com/story/show/42125089
Process locales through workflow.

Also ensure that en has the i18n.direction tag, so that the
workflow won't wipe this out.
Merge pull request #219 from alphagov/add-fco-list-of-languages

Add a whole bundle of new languages.

https://www.pivotaltracker.com/story/show/42125089