modified some of the menu helpers, added J-CART indication
improved & more flexible input device selection (ensure we have at least one connected device)
~ 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
+ improved ROM file browser
+ re-implemented support for held keys (fast update)
~ load background music from default FAT device to reduce dol size (temporary ?)
+ improved Menu transition effects
+ added support for ogg background music
+ improved ROM Selection Menu (automatic text scrolling, wiimote support, ...)
+ changed arrow buttons aspect (feel better now ?)
+ minor bufgixes and menu adjustments