Format dates in Blog Posts gridfield based on user preferences
Format dates in Blog Posts gridfield based on user preferences

Instead of always formatting to DD/MM/YYYY as Nice() does, format
the date based on user settings, using FormatFromSettings().

Fixes silverstripe/silverstripe-blog#384

kinglozzer/silverstripe-blog,micmania1/silverstripe-blog,javabrett/silverstripe-blog,micmania1/silverstripe-blog,silverstripe/silverstripe-blog,javabrett/silverstripe-blog,micmania1/silverstripe-blog,silverstripe/silverstripe-blog,kinglozzer/silverstripe-blog,javabrett/silverstripe-blog