Update VisualStudio project file to add the khronosTextureContainer file

Babylon.csproj

@@ -173,6 +173,7 @@
     <TypeScriptCompile Include="src\Tools\babylon.decorators.ts" />
     <TypeScriptCompile Include="src\Tools\babylon.dynamicFloatArray.ts" />
     <TypeScriptCompile Include="src\Tools\babylon.earcut.ts" />
+    <TypeScriptCompile Include="src\Tools\babylon.khronosTextureContainer.ts" />
     <TypeScriptCompile Include="src\Tools\babylon.observable.ts" />
     <TypeScriptCompile Include="src\Tools\babylon.rectPackingMap.ts" />
     <TypeScriptCompile Include="src\Tools\babylon.stringDictionary.ts" />