Fixed README location.

Author: andrey-serdyuk

Directory.Build.props

@@ -14,5 +14,14 @@
 		<IncludeSymbols>true</IncludeSymbols>
 		<SymbolPackageFormat>snupkg</SymbolPackageFormat>
 		<ContinuousIntegrationBuild>true</ContinuousIntegrationBuild>
+		<PackageReadmeFile Condition="Exists('$(MSBuildThisFileDirectory)README.md')">README.md</PackageReadmeFile>
 	</PropertyGroup>
+
+	<ItemGroup>
+		<None Include="$(MSBuildThisFileDirectory)README.md"
+			  Pack="true"
+			  PackagePath="/"
+			  Visible="false"
+			  Condition="Exists('$(MSBuildThisFileDirectory)README.md')" />
+	</ItemGroup>
 </Project>