Change Project#notified_users to check for the 'all' notification option. #6541
The previous mail_notification? check would always pass since the notifications where converted to strings and strings are always true.
Also changed Project#recipients to use #notified_users instead of duplicated code.
Based on contribution by Felix Schäfer.
Authored by: edavis10 2010-10-10
Parent: [r4246]
Child: [r4248]
