add html lang attribute, so browsers can properly recognire the content's language (like google chrome and it's translator)
jquery-ui datepicker locales. add locale js only if locale file exists to avoid 404 errors
use localdate instead of date in content edit
Bugfix in editcontent.twig

datepublish and datedepublish was scramled
Merge branch 'multilang' of github.com:ntomka/bolt into ntomka-multilang
Updating Dutch language file.
Fixing trailing space in a label.