intense desloppification, performance improvements, openmp ready, add audio, refactor everything, fix warnings and bad practices

vn.vcxproj.filters

@@ -36,6 +36,9 @@
     <ClCompile Include="src\window.cpp">
       <Filter>Source Files</Filter>
     </ClCompile>
+    <ClCompile Include="src\audio.cpp">
+      <Filter>Source Files</Filter>
+    </ClCompile>
   </ItemGroup>
   <ItemGroup>
     <ClInclude Include="include\compositor.h">
@@ -62,6 +65,9 @@
     <ClInclude Include="include\SDL2\SDL.h">
       <Filter>Header Files\SDL2</Filter>
     </ClInclude>
+    <ClInclude Include="include\audio.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
   </ItemGroup>
   <ItemGroup>
     <Image Include="assets\background.png">