Revert all .NET 4.0 framework and Visual Studio 2010 related commits in order to release a new stable version. Reverting this after release. (Reverts d7e2dbce26bfd51cc00cb370c8a804228008a1d3, ea475fd6d969fbf4bc179661a33bee4af4735116, c78293ebd446118f1e56061a321a143e296da74e, f22d5f844e16121f6fd9c92646dd76b13d2ee907, dff968f56ff140a471f187d4b5fb2929fcf95d79 &  4976809860e8d98cd97f9a99b750e88c7799f58d).