v1.7.0

The main contribution of this version is that it introduces the mozart_piano_sonatas (mps) dataset.

What's Changed

• Reorganizing data collections. by @napulen in #66
• Fixing trailing newlines. by @napulen in #67
• Adding mozart_piano_sonatas as submodule. by @napulen in #69
• Aggregating the MPS dataset by @napulen in #70
• Release v1.7.0 by @napulen in #76

Full Changelog: v1.6.0...v1.7.0