Can't install via nuget Windows Phone 8.1 Project

What steps will reproduce the problem?
1. Create a Windows Phone 8.1 Project. (do NOT create 8.1 Silverlight Project)
2. Goto NuGet package manager console and run "Install-Package 
Google.Apis.Drive.v2"
3. Follow the errors in package manager console

What is the expected output? What do you see instead?
Package expected to install successfully

What version of the product are you using?
Google.Apis.Drive.v2 - latest package

What is your operating system?
Windows 8.1 Pro

What is your IDE?
Visual Studio 2013 with Update 2

What is the .NET framework version?
4.5.1

Please provide any additional information below.
I think
1. You need updated ZLib.Portable
2. Change Auth UI to the new Windows Phone 8.1 UI which is non-Silverlight.

Original issue reported on code.google.com by monto...@gmail.com on 17 Jun 2014 at 5:03

Merged into: #471

kekewong / google-api-dotnet-client

Can't install via nuget Windows Phone 8.1 Project #469