Regression testing framework

[VariantXYZ]

Would be nice if there was some convenient CLI gameboy emulator to build a regression testing framework out of.

Something that would take the following as input:

• A ROM
• A save state
• A set of inputs
• A frame count

and generate:

• Output raw audio
• Frames

This would let us catch regressions for graphics and audio issues, and to some extent performance issues (actually a profile feature would be slick too).