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/controllers/reports_controller.rb

@@ -57,6 +57,7 @@ class ReportsController < ApplicationController
       issues_by_priority
       issues_by_category
       issues_by_author
+      @total_hours = @project.time_entries.sum(:hours)
       render :template => "reports/issue_report"
     end
   end