Add --check-code-style utility command.

thirdparty/fetch-thirdparty-deps.ps1

@@ -0,0 +1,12 @@
+if (!(Test-Path "nuget.exe"))
+{
+	echo "Fetching NuGet."
+	Invoke-WebRequest "http://nuget.org/nuget.exe" -OutFile "nuget.exe"
+}
+if (!(Test-Path "StyleCop.dll"))
+{
+	echo "Fetching StyleCop files from NuGet."
+	./nuget.exe install StyleCop.MSBuild -Version 4.7.49.0
+	cp StyleCop.MSBuild.4.7.49.0/tools/StyleCop*.dll .
+	rmdir StyleCop.MSBuild.4.7.49.0 -Recurse
+}