simplify
add progress service
workaround to allow running of scripts regardless of execution policy
Removed surplus  comment
Merge branch 'master' into UI

Conflicts:
	src/PlatformInstaller.Tests/Chocolatey/PackageManagerTests.cs
	src/PlatformInstaller/AppBootstrapper.cs
	src/PlatformInstaller/Chocolatey/PackageManager.cs
	src/PlatformInstaller/Chocolatey/PowerShellRunner.cs
	src/PlatformInstaller/ContainerFactory.cs
	src/PlatformInstaller/MainView.xaml
	src/PlatformInstaller/MainViewModel.cs