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
Setting $app variable to protected, which may be useful for 0c18498c
Merge pull request #1137 from xiaohutai/master

Setting $app variable to protected, which may be useful for 0c18498c
Merge branch 'multilang' of github.com:ntomka/bolt into ntomka-multilang
Updating Dutch language file.
Fixing trailing space in a label.
Fixing stray line. See #1136
Revert "Fixing stray line. See #1136"

This reverts commit 3365801856ec8b3fa65247837024549cd4b36429.