~fixed some memory leaks with Blip Buffer
~reverted previous change regarding frame synchronization: always use VSYNC when switched to 60hz (fix video issues in interlace mode 2)
~optimized cell rendering (less byte swapping)
~fixed savestate file version checking
~ modified LFO implementation to make it handles signed displacement value correctly (is that correct ? still need to be verified against real hardware)
~fixed oggplayer memory leak (LWP queue was not closed properly)
~do no use VSYNC callback for emulation synchronization anymore, (always uses DMA interrupt regardless the video mode)
~ optimized VDP renderer buffers size
~ fixed directories automatic creation
+ added game screenshot feature
+ added game screenshot support in ROM File browser
+ improved Controller menu icons
+ added new images for the new Controller menu
- removed unused images
