Import latest locatlisation csv data

Also had to regenerate the files to add translation keys that were
missing from the new data
Various corrections to imported locale data

Mainly incorrectly specified wildcards in RTL languages, some
incorrectly escaped bits of text, plus the obvious incidents of
missing whitespace.
Merge pull request #626 from alphagov/update-locales

Update latest locale translations

 https://www.pivotaltracker.com/story/show/51797381