mono/mono — pull request #827 by Blewzman (2013-12-05 18:42:35+00:00)
Title:  	Support IReadOnlyList in System.Linq.Enumerable.ElementAt and ElementAtOrDefault

This time with tests.

I had to delete my previous fork of Mono because I could not get rid of the merge commit. Please just reject my previous pull request. Sorry for inconvenience.