Adds a rake task to send reminders. An email is sent to each user with a list of the issues due in the next days, if any.

See @rake -D redmine:send_reminders@ for options.

git-svn-id: http://redmine.rubyforge.org/svn/trunk@1459 e93f8b46-1217-0410-a6f0-8f06a7374b81

lang/da.yml

@@ -621,3 +621,5 @@ error_scm_annotate: "The entry does not exist or can not be annotated."
 label_planning: Planlægning
 text_subprojects_destroy_warning: 'Its subproject(s): %s will be also deleted.'
 label_and_its_subprojects: %s and its subprojects
+mail_body_reminder: "%d issue(s) that are assigned to you are due in the next %d days:"
+mail_subject_reminder: "%d issue(s) due in the next days"