was troublesome so bumped up max shaders to 10 for now, some style nits in
RSX video driver, variable center_y could be uninitialized so fixed that
in psl1ght_input.c
* remove var error in psl1ght input
* (psl1ght) add modern_alpha_blend and modern_opaque rsx shaders
* (psl1ght) add perf improvements to the rsx driver
* add rsx gfx for psl1ght
* (psl1ght) set rsx as a compatible video driver
* Do xmb menu scaling for psl1ght
* (psl1ght) update Makefile to use latest shaders and more UI menu options