here's an update of customizable fields of type date to integrate

Hi,

here's an update of customizable fields of type date to integrate optional hours there.

Redmine : http://www.redmine.org/issues/5458#note-62

the new date plugin incorporates language translations, so I delete the files javascript i18n of the old version.

http://plugins.jquery.com/datetimepicker/

I also changed the integration test continues to take Compre changes.

![image1](https://cloud.githubusercontent.com/assets/3640232/5063348/887cc2e2-6de3-11e4-8f42-0b999eda0afe.png)

![image2](https://cloud.githubusercontent.com/assets/3640232/5063349/928aefc0-6de3-11e4-976e-aad9ffa2130a.png)

![image3](https://cloud.githubusercontent.com/assets/3640232/5063350/975f8dd0-6de3-11e4-8372-152f104b5696.png)