reworked NuGet package to suppress architecture mismatch warnings with native libraries in any configuration

(cherry picked from commit b8cd9067ea895419fc768d7ee6495548902ab03c)
moved common assembly attributes to a shared location
added assembly attributes to both native DICOM libraries

(cherry picked from commit 13d447071efa8225b0213ad64bcf7978d8b04e84)
Merge branch 'NuGetPatch'
Merge branch 'SharedAssemblyInfo'