This is not a NuGet package.

These assemblies come from the WCF Data Services October 2011 CTP
You can find the full install here: http://www.microsoft.com/download/en/details.aspx?id=27728
These files are used in order to serve the sample WCF Data Services site for integration testing of ruby_odata
The reason for these new files is to that WCF DS can read Entity Framework 4.1's "Code First" approach.
