Merge pull request #213 from takahashiyuya/master

(ja) Update reminder.php of ja.
Update de/reminders.php

Corrected language:
 - *at least* 6 characters (not six characters)
 - token is invalid *or expired*
Update de/validation.php: required_with_all en->de

translated required_with_all to german
Merge pull request #214 from lanort/patch-1

(de) Update de/reminders.php: language corrections
Merge pull request #215 from lanort/patch-2

(de) Update de/validation.php: required_with_all en->de
update validation.php for ja.