Fix toolkit/WrapPanel

Steps I took:
-Uninstalled/reinstalled WPToolkit
-Added "
xmlns:controls="clr-namespace:Microsoft.Phone.Controls;assembly=Microsoft.Phone.Controls.Toolkit"
" to the beginning of the "Types.xaml" file.
- Added "    using Microsoft.Phone.Controls;   " to the beginning of the
"Types.xaml.cs" file.
-Changed <"WrapPanel"> to <controls:WrapPanel>