cleanup bootstrap
Bootstrap 2.3.2 added and compatibility changes for dropdown menu
get_absolute_path added to Article model
Add notification interval to Article Settings page + New Notifications Settings page
pep8 cleanup
hand empty notifications settings
Fixed: "wiki_footer_prepend block"
Merge pull request #165 from BenMarchant/patch-1

Fixed: "wiki_footer_prepend block"
Visitor cannot use admin as a slug (just in case !)
Merge pull request #166 from BenMarchant/patch-2

Visitor cannot use admin as a slug (just in case !)
Cleanup 'admin' slug error message
Merge remote-tracking branch 'upstream/master'

Update