ROMMenu + audio changes

[DiscostewSM]

• Directory support
• List alphabetized (folders priority)
• Display current directory in spot where title & version number used to be
• Current directory is saved when launching a game, and is restored when launching the emulator afterwards.
• Noise implemented in the audio system (games like FF IV and V use it a lot in battles)
• Gaussian Interpolation
• Altered audio streaming for smoother and less-clicky audio.

[DiscostewSM]

Included the addition of noise to this pull request