Fixes #547 - Duplicate assets are pointless
Added a couple of missing translation strings. Fixed a translation typo for the request log empty button - It should be request_log not event_log.
Added Romanian translation files in modules/*/lang/ro and modified modules/backend/models/BackendPreferences.php and modules/system/lang/en/lang.php in order for the language to appear in the admin section
Merge branch 'develop'
Fixes rebase issue in #557