Add trap_R_LerpTag and trap_R_ModelBounds to game

Dedicated server can either have model loading compiled into it (default behavior), or if SERVER_USE_RENDERER_DLOPEN=1 use external renderer from com_renderer.
Client uses whatever renderer it's using (internal or external) to load models for server.

If client reloads renderer (vid_restart, snd_restart, etc) all model handles become invalid, so GAME_VID_RESTART gets called so game vm can re-register models.
Revert "Make game use trap_Alloc", QVM trap_Alloc is buggy

This reverts commit f638259d1b1ca00e583de1bdd97adf0a47622cd3.
Revert "Remove g_mem.c from Code::Blocks game project"

This reverts commit 74a6b18638f80aa698fb5d230f72c2b371ee97ab.
Revert "Remove g_debugAlloc"

This reverts commit 529d36a5c6229cdba41b39224b020d5133d4d26a.
Merge branch 'master' of git://github.com/zturtleman/spearmint