Nuked spurious ./tests directory

Only images, someone added a bit too much to the index
Fix for issue #219: tags should list only main articles, not translations
Merge pull request #810 from avaris/translations_in_tags

Fix for issue #219: tags should list only main articles, not translations
Merge pull request #809 from cdunklau/clean_up_images

Nuked spurious ./tests directory
Merge branch 'master' into wp-import