Fix Cleanup-Disks.ps1 / Add elevation.

Signed-off-by: F.D.Castel <fdcastel@gmail.com>
Change SlikSVN to Svn

Signed-off-by: F.D.Castel <fdcastel@gmail.com>
Setup-First.ps1: setup only one keyboard layout / Remove .NET 4.0 installation

- .NET 4.0 installation is unnecessary since Chocolatey 0.9.8.21
- Add new scripts: Setup-SingleKeyboardLayout.ps1 and Setup-DualKeyboardLayout.ps1

Signed-off-by: F.D.Castel <fdcastel@gmail.com>
* Setup-First.ps1: Fix console font for PowerShell.

Signed-off-by: F.D.Castel <fdcastel@gmail.com>