implement a %lastupdated% column #122

introduced DateTime Type

This is similar to Date but also accepts a time. Only uses a Date
picker, no time picker as we currently have none available.

Localize confirm message

translation update

Update lang.php

small improvements + untranslated string

Update editor_intro.txt

small improvements

Update editor_edit.txt

"dans" instead of "à".

Update lang.php

Update editor_intro.txt

Update editor_edit.txt

Update assignments_intro.txt

typo

Create settings.php

FRENCH language file

Create lang.php

Create editor_intro.txt

Create editor_edit.txt

Create delete_intro.txt

Create assignments_intro.txt

translation update

Utilize StructException's translation handling

Localize error message

translation update

translation update

Added way to delete a schema and all its data