Bug: some tracks show blank high-resolution waveform in 3.x

[mr-smidge]

Overview

When exporting as library versions 2.x or 3.x, some tracks do not show any high-resolution waveform on Denon hardware. Note that the high-res waveform is generated on-the-fly by DJ hardware - it is not stored or written by libdjinterop. Instead, there must be something about the exports written by libdjinterop that confuse the player and result in no waveform being generated.

Acceptance Criteria

• The above issue must be fixed.

[mr-smidge]

Sample tracks that can reliably replicate this issue have been provided (to me), but for obvious reasons are not uploaded publically on this issue.

[mr-smidge]

Initial testing suggests that the bug is caused by the library using the older V1 encoding of the trackData field, instead of the new (backwards-incomaptible) V2 encoding. I clearly didn't notice this when doing the initial V2 implementation.

However, there are some residual lssues where the high-res waveform doesn't quite line up with the actual beat data... Will continue investigations.

[mr-smidge]

PR #102 resolves this by upgrading to the V2 track data format, yay.