VS Commands to import settings.

I use several VSSettings files, including one for a Single Monitor (on the road) and one for Multiple Monitors (at my desk). It would be great to have PoSh commands within Visual Studio's Package Manager Console to easily import VSSettings (rather than wasting time with the Import UI).

```
$dte.ExecuteCommand("Tools.ImportandExportSettings", "/import:""$path""")
```
