• loading B on demand causes issues, stop doing that
  
• deleting CORE::GLOBAL::require on "use circular::require" makes require
  calls that were already bound stop working, stop doing that (it's
  unnecessary now that we're dynamic scoped anyway)
  
• bump the perl version requirement to 5.10, since the hint hash didn't exist before then
  
  • i'd be willing to accept patches to restore the functionality on 5.8,
    i just don't feel like writing it myself