code cleanup
Installed CreateNewNuGetPackageFromProjectAfterEachBuild
Modified New-BugetPackage.ps1 like jhauser documented on https://newnugetpackage.codeplex.com/wikipage?title=NuGet%20Package%20To%20Create%20A%20NuGet%20Package%20From%20Your%20Project%20After%20Every%20Build
added nuspec and finalized it, removed mp4box.exe from been packed two times into nupkg