Adds a Setting to control how an Issue's done_ratio is calculated:

* Issue field (default) - the done_ratio field for the Issue
* Issue status - uses the Issue Status's value

  #4274

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@3151 e93f8b46-1217-0410-a6f0-8f06a7374b81

db/migrate/20091123212029_add_default_done_ratio_to_issue_status.rb

@@ -0,0 +1,9 @@
+class AddDefaultDoneRatioToIssueStatus < ActiveRecord::Migration
+  def self.up
+    add_column :issue_statuses, :default_done_ratio, :integer
+  end
+
+  def self.down
+    remove_column :issue_statuses, :default_done_ratio
+  end
+end