-Added dotnet build

-Removed WinRT files
-Updated solution files to VS2015
-Updated psake

Src/NuGet.Config

@@ -1,7 +1,8 @@
 <?xml version="1.0" encoding="utf-8"?>
 <configuration>
   <packageSources>
+    <!--To inherit the global NuGet package sources remove the <clear/> line below -->
     <clear />
-    <add key="Offical NuGet.org" value="https://nuget.org/api/v2/" />
+    <add key="api.nuget.org" value="https://api.nuget.org/v3/index.json" />
   </packageSources>
 </configuration>