V0.5.0

• Fixed reset of mapper registers.
• Fixed loading of roms that are not power of 2.
• Fixed timing of several opcodes.
• Fixed timing of interrupts.
• Fixed timing of address calculations.
• Fixed some cpu opcodes.
• Fixed interrupt handling.
• Fixed timers.
• Fixed sweep on sound channel 3.
• Fixed noise feedback selection.
• Fixed sound sample playback.
• Optimized cpu core a bit.
• Added support for serial port interrupts.
• Added support for battery low.
• Added new debug menu.
• Linked NDS battery to WS battery.
• Better menu traversing.