- remove unnecessary x64 and x86 configurations from the solution
- dotnet/sdk#396 has been fixed; web sites target x86 automatically
nit: sort dependencies
- aspnet/Testing#248
- xUnit no longer supports .NET 4.5.1
- build tests for desktop .NET only on Windows
- except Microsoft.AspNetCore.Server.IISIntegration.FunctionalTests; will skip that another way (later)
Also fix line endings in project files; unable to proceeed otherwise