Rename Display to Window.

It makes more sense to be consistent and always call it window.

source/Display/GLContext.cpp

@@ -1,26 +0,0 @@
-
-#include <Spectre/Display/GLContext.h>
-
-#ifdef SPECTRE_PLATFORM_WIN
-#include <Platform/Win32/Win32GLContext.h>
-typedef sp::Win32GLContext ContextType;
-#elif SPECTRE_PLATFORM_UNIX
-#include <Platform/Unix/GLXContext.h>
-typedef sp::GLXContext ContextType;
-#else
-#error "No GLContext implementation exists"
-#endif
-
-namespace sp {
-
-GLContext* GLContext::create()
-{
-	return new ContextType();
-}
-
-GLContext::~GLContext()
-{
-	// Nothing to do.
-}
-
-} // namespace sp