orbital: start implementing the mesh builder features found in the original.

win32/orbital.vcxproj

@@ -27,6 +27,7 @@
     </ProjectConfiguration>
   </ItemGroup>
   <ItemGroup>
+    <ClInclude Include="..\orbital\mesh.h" />
     <ClInclude Include="..\orbital\orbital.h" />
   </ItemGroup>
   <ItemGroup>

win32/orbital.vcxproj.filters

@@ -1,5 +1,8 @@
 <?xml version="1.0" encoding="utf-8"?>
 <Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <ItemGroup>
+    <ClInclude Include="..\orbital\mesh.h" />
+  </ItemGroup>
   <ItemGroup>
     <ClInclude Include="..\orbital\orbital.h" />
   </ItemGroup>