embed muda version in history

[bmcfee]

Following Ich's comments offline: for full reproducibility, we should include muda.version in the output jams muda sandbox.

[bmcfee]

Proposed solution:

When calling jam_pack, seed the muda box with a version dictionary including the following

• [x] muda
• [x] librosa
• [ ] pyrubberband
• [x] jams
• [x] pysoundfile

[bmcfee]

implemented by #21