SDL2 property sheet for MSVC.

src/build/sdl2.props

+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <ImportGroup Label="PropertySheets" />
+  <PropertyGroup Label="UserMacros" />
+  <PropertyGroup />
+  <ItemDefinitionGroup>
+    <ClCompile>
+      <PreprocessorDefinitions>WITH_SDL;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <AdditionalIncludeDirectories>..\..\3rdp\win32.release\sdl2\include;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
+    </ClCompile>
+    <Link>
+      <AdditionalLibraryDirectories>..\..\3rdp\win32.release\sdl2\lib\x86;%(AdditionalLibraryDirectories)</AdditionalLibraryDirectories>
+    </Link>
+    <Link>
+      <AdditionalDependencies>SDL2.lib;%(AdditionalDependencies)</AdditionalDependencies>
+    </Link>
+  </ItemDefinitionGroup>
+  <ItemGroup />
+</Project>
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