Revert "Do not build the Windows8Shim project in Release configuration."
Revert "Do not build the Windows8Shim project in Release configuration."

This reverts commit 9dc51c819216bced44d7613e3509a994f0a28c84.

campersau/NuGetPackageExplorer,NuGetPackageExplorer/NuGetPackageExplorer,BreeeZe/NuGetPackageExplorer,dsplaisted/NuGetPackageExplorer,NuGetPackageExplorer/NuGetPackageExplorer