I guess this simply means there isn't any restrictions as the time of this writing. Personally I think we should include one (MIT or Ruby).

MIT prefer!

MIT 和 Ruby 的区别在哪里

@huacnlee MIT 可以把这里的代码用在私有软件中。私有软件的代码可以不开源。Ruby 类 GPL，只要用了 GPL 代码，你的代码也需要开源的。

The Ruby License is the open-source license applied to the Ruby programming language and also available to be used in other projects.

The Free Software Foundation comments: "This is a Free Software license, compatible with the GPL via an explicit dual-licensing clause." refs: http://en.wikipedia.org/wiki/Ruby_License

The MIT License is a free software license originating at the Massachusetts Institute of Technology (MIT). It is a permissive license, meaning that it permits reuse within proprietary software provided all copies of the licensed software include a copy of the MIT License terms. refs: http://en.wikipedia.org/wiki/MIT_License

MIT 可以

Ruby 1.9.3 将改用 BSD 许可证发布. 2-clause BSD 许可证（大体上相当于 MIT 许可证）。

http://www.iteye.com/news/22318-ruby-1_9_3_bsd_license

Matz 很后悔自己吃饱了撑的，为什么要去发明一个 Ruby 协议。^-^ 参见《松本行弘的程序世界》一书

@MasterD Just let you know we have MIT license added.