Group builder algorithm works forwards, builds more static info about each group.

Algorithms now iterate over groups first, then segments within the groups as necessary.

Diverging from hardware, allowing a group to have 2 active loop segments by holding each segment button individually rather than both together (or using abLoop mode)

Was abusing legacy match from when using a triangle oscillator for the light levels

Using simpler sine oscillators for flashing lights that can render with a phase offset.

Cleaning up warnings.