Add current path to the common include paths

This fixes IntelliSense in renderers code. (thanks @ForserX)
Also replace backslashes with slashes.

src/Common.props

@@ -65,7 +65,7 @@
   </PropertyGroup>
   <ItemDefinitionGroup>
     <ClCompile>
-      <AdditionalIncludeDirectories>$(SolutionDir);$(xrExternals);$(ProjectDir);$(xrSdkDir)include;$(xrSdkDir)DXSDK/Include;$(xrExternals)luajit\src;$(xrExternals)luabind;$(xrExternals)GameSpy\src;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
+      <AdditionalIncludeDirectories>./;$(SolutionDir);$(xrExternals);$(ProjectDir);$(xrSdkDir)include;$(xrSdkDir)DXSDK/Include;$(xrExternals)luajit/src;$(xrExternals)luabind;$(xrExternals)GameSpy/src;%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
       <DebugInformationFormat>ProgramDatabase</DebugInformationFormat>
       <!--
         4251 : class 'x' needs to have dll-interface to be used by clients of class 'y'
@@ -81,7 +81,7 @@
       <PreprocessorDefinitions>LUABIND_DYNAMIC_LINK;MSVC;dSINGLE;WIN32;_SECURE_SCL=0;_CRT_SECURE_NO_WARNINGS;_CRT_SECURE_NO_DEPRECATE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
     </ClCompile>
     <Link>
-      <AdditionalLibraryDirectories>$(xrSdkDir)libraries;$(xrLibDir);$(xrSdkDir)DXSDK/Lib/$(PlatformShortName)\;%(AdditionalLibraryDirectories)</AdditionalLibraryDirectories>
+      <AdditionalLibraryDirectories>$(xrSdkDir)libraries;$(xrLibDir);$(xrSdkDir)DXSDK/Lib/$(PlatformShortName);%(AdditionalLibraryDirectories)</AdditionalLibraryDirectories>
       <ImportLibrary>$(xrLibDir)$(TargetName).lib</ImportLibrary>
     </Link>
     <Lib>