workaround for SHFB bug in recent NET version (#58)

* Revert recent nuget updates

* testing different shfb version

* WIP

Author: timunie

src/ApiDocumentation/ApiDocumentation.shfbproj

@@ -13,6 +13,10 @@
 		<SchemaVersion>2.0</SchemaVersion>
 		<ProjectGuid>0d38b9f6-2433-453b-963f-a73964bf9f5d</ProjectGuid>
 		<SHFBSchemaVersion>2017.9.26.0</SHFBSchemaVersion>
+		<!-- Workaround for dotnet/msbuild behavior that can strip project properties
+		     when the build task tries to use the executing project instance. See
+		     https://github.com/EWSoftware/SHFB/issues/1146 -->
+		<AlwaysLoadProject>True</AlwaysLoadProject>
 		<!-- AssemblyName, Name, and RootNamespace are not used by SHFB but Visual Studio adds them anyway -->
 		<AssemblyName>ApiDocumentation</AssemblyName>
 		<RootNamespace>ApiDocumentation</RootNamespace>