Entity Framework Code First graph update extension method.
Please see http://refactorthis.wordpress.com/2012/12/11/introducing-graphdiff-for-entity-framework-code-first-allowing-automated-updates-of-a-graph-of-detached-entities/ for more information.
Nuget package is at http://nuget.org/packages/RefactorThis.GraphDiff/
See the LICENSE file for license rights and limitations (MIT).