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