Use the HGE struct and set finalizer on Texture
Use the HGE struct and set finalizer on Texture

* Also rename Col to Color
* Tex to Texture
* Texture in Quad to a pointer and then have a struct to pass to the C
  function.
* Since Texture on Quad and Triple are now pointers, hopefully the
  SetFinalizer will be callable on them.

losinggeneration/hge,losinggeneration/hge-go,losinggeneration/hge,losinggeneration/hge-go