[Form] Fixed DateType when used with the intl extension disabled.
Updated copyright license to 2013

Updated copyright license to 2013
Merge branch 'license-2013-2.1' of github.com:kevindew/symfony into license-2013-2.1

* 'license-2013-2.1' of github.com:kevindew/symfony:
  Updated copyright license to 2013
  [Form] Fixed DateType when used with the intl extension disabled.