Time report can be done at issue level (closes #970) + timelog views xhtml validation.

git-svn-id: http://redmine.rubyforge.org/svn/trunk@1319 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/models/issue.rb

@@ -237,4 +237,8 @@ class Issue < ActiveRecord::Base
       yield
     end
   end
+  
+  def to_s
+    "#{tracker} ##{id}: #{subject}"
+  end
 end