* Added ARM64 Platform to Directory.Build.props
* Added ARM64 project configuration for Cpp.Build.props
* Added ARM64 configuration to solution. Keeping at x64 for now
* Add common csproj/vcxproj settings to Directory.Build.props
* Set TreatWarningsAsErrors to true for all c# projects
* Minor fixes in unit test projects where Analyzers where not enabled before
* Clean up Directory.Build.props
* Remove properties from ImageResizer csprojs files