• Re-export on 'use Moo' after 'no Moo'
  
• Export meta() into roles (but mark as non-method to avoid composing it)
  
• Don't generate an accessor for rw attributes if reader+writer both set
  
• Support builder => sub {} ala MooseX::AttributeShortcuts
  
• Fix 'no Moo;' to preserve non-sub package variables
  
• Switch to testing for Mouse::Util->can('find_meta') to avoid
  exploding on ancient Mouse installs
  
• Fix loading order bug that results in _install_coderef being treated
  as indirect object notation