Simple time tracking functionality added. Time can be logged at issue or project level.

There's no aggregation reports for now, it's just possible to see all time entries for a project or an issue.
A new "activities" enumeration is added.
Permission for a role to log time must be set (new "Time tracking" section in role permissions screen).

git-svn-id: http://redmine.rubyforge.org/svn/trunk@368 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/helpers/sort_helper.rb

@@ -107,10 +107,10 @@ module SortHelper
       order = 'desc' # changed for desc order by default
     end
     caption = titleize(Inflector::humanize(column)) unless caption
-    params = {:params => {:sort_key => column, :sort_order => order}}
+    #params = {:params => {:sort_key => column, :sort_order => order}}
     link_to_remote(caption,
-                  {:update => "content", :url => { :sort_key => column, :sort_order => order}},
-                  {:href => url_for(:params => { :sort_key => column, :sort_order => order})}) +
+                  {:update => "content", :url => params.update( :sort_key => column, :sort_order => order)},
+                  {:href => url_for(:params => params.update(:sort_key => column, :sort_order => order))}) +
     (icon ? nbsp(2) + image_tag(icon) : '')
   end
 

app/helpers/timelog_helper.rb

@@ -0,0 +1,2 @@
+module TimelogHelper
+end