Added Fody.Stamp. Updated assemblies.
Created a separate solution and pojects for .NET 4.0
Temporarily remove stamp.
And weavers
Separate Nuget packaging from solution.
Created packaging folder. Fixed build output directories for .NET 4.0. Edited nuspec to reflect changes.
Fixed wrong paths in nuspec
Include code contracts in nuget package.
Place contract asemblies in subfolder CodeContracts in nuget package
Merge branch 'buildsystem' into develop