mruby/mruby — pull request #353 by masamitsu-murase (2012-07-07 15:21:06+00:00)
Title: Improvement of Module#include.

I tried to improve Module#include.

I added the following features:
* 'include' method calls append_features and included method internally.
* implement append_features and included_modules method.
* include a module only if it is not included in the receiver.

Please review and let me know if you find some issues.