Mark the package as dirty when adding an assembly as framework reference.
Mark the package as dirty when adding an assembly as framework reference.

--HG--
branch : 2.0

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