Updated all PCL to support WPA81

All PCL libraries are now set to build under Profile328, which is
everything we had plus WPA 8.1. Includes 0.1 version kick for affected
libraries.
Fix for .NET 4.5 package support in OWIN NuGet

The MVC and WebAPI OWIN packages were getting copied to the net40
instead of net45 location, which was the wrong target.