Explain changes made to the registry

[mjwsteenbergen]

When I am looking at dev_app.ps1 I don't know what all of the following settings actually do:

Set-ItemProperty -Path HKCU:\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced -Name NavPaneExpandToCurrentFolder -Value 1

It would be great to see what all of these do, like jay harris did in his dotfiles for windows.

[crutkas]

great idea, i started trying to do that on some stuff but yes, would be useful if we did it everywhere for stuff that wasn't straight forward.

[crutkas]

@mjwsteenbergen i have this checked into a branch, won't close until it is in master

[yodurr]

part of PR #59