Nuance 0.6.5

• Fix loading of nuance.cfg when drag and drop is used
• Hide mouse cursor when in fullscreen mode
• Make rendering window behave like the others when trying to close it (e.g. clicking 'X' and Alt-F4 work now)
• Fix user breakpoints
• Fix 16/16z pixel format bilinear DMA
• Enable kprintf outputs (also new documentation about it within this readme file)
• Fix regression in code interpreter (shift+XXX opcodes)
• Slightly optimize code interpreter (ALU add+/sub+XXX opcodes)