Upgrade Portable projects to visual studio v15 (VS2017)

Animation/Aether.Animation.PORTABLE.csproj

@@ -47,12 +47,9 @@
   </ItemGroup>
   <Import Project="$(MSBuildExtensionsPath32)\Microsoft\Portable\$(TargetFrameworkVersion)\Microsoft.Portable.CSharp.targets" />
   <ItemGroup>
-    <Reference Include="MonoGame.Framework">
-      <HintPath>..\packages\MonoGame.Framework.Portable.3.2.99.1-Beta\lib\portable-net40+sl40+win+wp80\MonoGame.Framework.dll</HintPath>
-      <Private>False</Private>
-    </Reference>
-  </ItemGroup>
-  <ItemGroup>
-    <None Include="packages.config" />
+    <PackageReference Include="MonoGame.Framework.Portable" Version="3.2.99.1-Beta">
+      <PrivateAssets>all</PrivateAssets>
+      <ExcludeAssets>runtime</ExcludeAssets>
+    </PackageReference>
   </ItemGroup>
 </Project>

Atlas/Aether.Atlas.PORTABLE.csproj

@@ -40,13 +40,9 @@
   </ItemGroup>
   <Import Project="$(MSBuildExtensionsPath32)\Microsoft\Portable\$(TargetFrameworkVersion)\Microsoft.Portable.CSharp.targets" />
   <ItemGroup>
-    <Reference Include="MonoGame.Framework">
-      <HintPath>..\packages\MonoGame.Framework.Portable.3.2.99.1-Beta\lib\portable-net40+sl40+win+wp80\MonoGame.Framework.dll</HintPath>
-      <Private>False</Private>
-    </Reference>
+    <PackageReference Include="MonoGame.Framework.Portable" Version="3.2.99.1-Beta">
+      <PrivateAssets>all</PrivateAssets>
+      <ExcludeAssets>runtime</ExcludeAssets>
+    </PackageReference>
   </ItemGroup>
-  <ItemGroup>
-    <None Include="packages.config" />
-  </ItemGroup>
-  <ItemGroup />
 </Project>

Atlas/packages.config

@@ -1,4 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<packages>
-  <package id="MonoGame.Framework.Portable" version="3.2.99.1-Beta" targetFramework="portable-net45+win+wp80+MonoAndroid10+xamarinios10+MonoTouch10" />
-</packages>

packages/repositories.config

@@ -1,8 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <repositories>
   <repository path="..\Animation\packages.config" />
-  <repository path="..\Atlas\packages.config" />
   <repository path="..\Shaders\Deferred\packages.config" />
   <repository path="..\Shaders\FXAA\packages.config" />
-  <repository path="..\Shaders\InfiniteGrid\packages.config" />
 </repositories>