Dartist/Mixins — pull request #6 by enyo (2013-05-06 18:52:09+00:00)
Title: Updated the library to work with latest master.

There is only one test that doesn't pass right now.
It's in `CollectionTests.dart` and it is the test `collections: sortBy -> sortBy with undefined values`

I have no Idea why, but the `.toDebugString()` function always returns `Instanceof'MappedListIterable'` instead of the actual content.