|BUILD CONFIGURATION|
[Windows]
* Using the new build layout (with Source and Header in the root, and the
  library subtype following)

|SOURCE|
[Common::OpenGL_GLModel]
[Common::OpenGL_GLVertexCache]
[Common::OpenGL_GLVertexCacheManager]
* Added an #if defined guard to prevent platforms not using OpenGL to skip
  building the file
|SOURCE|
[Windows::System::WindowsWindow]
* Added the header and source files, declaring the member functions
Merge branch 'build_configuration' into unstable