github/Mantle — pull request #133 by robb (2013-09-05 09:50:44+00:00)
Title: Adding subclassing notes to README

I took a shot at adding subclassing notes to the README, mostly inspired by #88 but I also threw in `-validate:`.

[all hail the markdown preview eggplant :eggplant:](https://github.com/github/Mantle/tree/subclassing-notes#subclassing-notes)

Let me know what you think.

Closes #88