stdReg - new keys and items

# Example of adding a windows explorer context menu item

```vb
With stdReg.Create("HKEY_CLASSES_ROOT\Directory\shell")
  With .addKey("MyApp")
    .value = "Open with My&App"
    With .addItem("icon")
      .value = "C:\Program Files\MyApp\MyIcon.ico"
    End With
    With .addKey("command")
      .value = """C:\Program Files\MyApp\MyApp.exe"" ""%1"""
    End With
  End With
End With
```