Read framebuffers pixel data to memory

Rather simple (but large?) code using glReadPixels and Memcpy to read pixel data from framebuffers to where the game expects it to be memory-wise. I also committed a small fix for the debugger since it was referencing an undefined macro in 64 bits Windows, but that one should have gone on master; just forgot to checkout before committing.

As I think I said in issue #1686, I only tested this with Danganronpa (an English-translated demo for the game can be found at http://danganronpa.wordpress.com/downloads/ if something needs checking).