Updated NuGet.Core and added minClientVersion to list packages and display packages view

Open Question: Do we show it in both the list and package details view?

Screenshots:

![In the List View](https://f.cloud.github.com/assets/7574/260792/55240046-8cde-11e2-9f10-4cb0bbad9ba0.png)

![In the Details View](https://f.cloud.github.com/assets/7574/260793/5c335e40-8cde-11e2-89b7-79f312c9cf74.png)