#2008 - Add warnings if some active modules are obsolete.
- added module::get_obsolete_modules_message function
- put message on admin/dashboard
- put message on admin/modules
- put message on upgrader
- updated unit test golden file xss_data
Merge pull request #155 from shadlaws/fix_2008

#2008 - Add warnings if some active modules are obsolete.
Merge branch 'master' into 3.0.x