README.md for Transitioning to Xcode 4.

Transitioning_To_Xcode_4/README.md

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+Transitioning to Xcode 4
+========================
+
+With the introduction of Xcode 4, the workflow for creating MonoTouch applications
+that have interfaces designed in Interface Builder has changed. This sample supplements
+the article on transitioning Xcode 3 apps to Xcode 4, where UIs can be designed in the
+new integrated Interface Builder.