the receiver should be included in ancestors even when it's a singleton class
Merge branch 'master' of github.com:mruby/mruby
Merge branch 'master' of github.com:mruby/mruby
Implement GemList which can identify GEM duplicates
Use advanced GemList as list for GEMs
Move GemList to MRuby::Gem::List. More logical location
Merge branch 'gem-duplication' of https://github.com/bovi/mruby into bovi-gem-duplication
avoid subclassing Array not to inherit too much methods
remove explicit check to honor duck typing
Merge branch 'master' of github.com:mruby/mruby
Merge branch 'bovi-gem-duplication'