F-3r/memory_storage — pull request #1 by patriciomacadden (2013-10-23 21:49:18+00:00)
Title: Refactor the MemoryStorage class and specs

This PR includes the following refactorings:

* Use a method called `storage` instead of a class variable `@@storage`. With this change, everything is under `class << self`
* Add a `flush` method for testing (because everything stays in the class definition, we need to flush the storage)
* Specs refactoring