• Fixed stupid bug in newest Policy modules. They were returning
  PPI objects instead of Perl::Critic::Violation objects. Doh!
  
• Fixed test scripts to prevent failures if the user already has a
  .perlcriticrc file.
  
• 'ProhibitHardTabs' now allows leading tabs by default.
  
• Put the Changes file in reverse-chronological order, so the most
  recent stuff is easy to find at the top of the file