Namespace change

@bermudezjd 
Removes project namespace 'ab:' in favor of instituting a URL naming convention of pre-pending 'ab_testing_tool_' to given url names.
e.g.
url(r'^$', render_control_panel, name='index')
->
url(r'^$', render_control_panel, name='ab_testing_tool_index')

Pull request created for record-keeping.