Refactor: #issues_to_csv and #entries_to_csv merged into QueriesHelper#query_to_csv.

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@11448 e93f8b46-1217-0410-a6f0-8f06a7374b81
Rename issues CSV and PDF exports.

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@11449 e93f8b46-1217-0410-a6f0-8f06a7374b81
Set version to 2.3.0.

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@11450 e93f8b46-1217-0410-a6f0-8f06a7374b81