All translations: RSS -> Atom (#13460).

Patch by Daniel Felix.

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@11654 e93f8b46-1217-0410-a6f0-8f06a7374b81
Updates for 2.3.0 release.

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@11657 e93f8b46-1217-0410-a6f0-8f06a7374b81
Add a "Cancel" button to the "Delete" project page when deleting a project (#2795).

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@11662 e93f8b46-1217-0410-a6f0-8f06a7374b81
JQuery Datepicker popup is missing multiple month/year modifiers (#13260).

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@11663 e93f8b46-1217-0410-a6f0-8f06a7374b81
Merge remote-tracking branch 'upstream/master'