build: add a huge lol.props property sheet that seems to do the job for Visual Studio.

build/msbuild/lol.props

@@ -0,0 +1,20 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+
+  <Import Project="$(LolDir)\build\msbuild\lol.config.props" />
+  <ImportGroup Label="ExtensionSettings">
+    <Import Project="$(LolDir)\build\msbuild\lolfx.props" />
+  </ImportGroup>
+  <ImportGroup Label="PropertySheets">
+    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
+    <Import Project="$(LolDir)\build\msbuild\lol.vars.props" />
+  </ImportGroup>
+  <PropertyGroup Label="UserMacros" />
+  <Import Project="$(LolDir)\build\msbuild\lol.rules.props" />
+  <ItemDefinitionGroup />
+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
+  <ImportGroup Label="ExtensionTargets">
+    <Import Project="$(LolDir)\build\msbuild\lolfx.targets" />
+  </ImportGroup>
+
+</Project>