Adding loader for CIPI dataset

[PRamoneda]

Adding loader for CIPI (Can I play it?)

Description

Please include the following information at the top level docstring for the dataset's module mydataset.py:

• Describe annotations included in the dataset
• Indicate the size of the datasets (e.g. number files and duration, hours)
• Mention the origin of the dataset (e.g. creator, institution)
• Describe the type of music included in the dataset
• Indicate any relevant papers related to the dataset

Dataset loaders checklist:

• Create a script in scripts/, e.g. make_my_dataset_index.py, which generates an index file.
• Run the script on the canonical version of the dataset and save the index in mirdata/indexes/ e.g. my_dataset_index.json.
• Create a module in mirdata, e.g. mirdata/my_dataset.py
• Create tests for your loader in tests/datasets/, e.g. test_my_dataset.py
• Add your module to docs/source/mirdata.rst and docs/source/table.rst
• Run tests/test_full_dataset.py on your dataset.

[codecov]

Codecov Report

Merging #599 (0dad936) into master (496eb4a) will increase coverage by 0.06%.
Report is 8 commits behind head on master.
The diff coverage is 98.06%.

@@            Coverage Diff             @@
##           master     #599      +/-   ##
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+ Coverage   96.96%   97.02%   +0.06%     
==========================================
  Files          58       60       +2     
  Lines        6990     7133     +143     
==========================================
+ Hits         6778     6921     +143     
  Misses        212      212              

[genisplaja]

Hey @PRamoneda, thanks for that! Just adding some questions/comments and minor fixes to do. Let me know if you have any questions!

[genisplaja]

I think this message is not well written! Because if a music xml file is not available, load_score will fail and specify which file is missing, but here, you will print the entire list... maybe you could just say something like "Missing MusicXML files. Did you run .download()?

[genisplaja]

hey @PRamoneda sorry we missed that one. Can you take a look again?

[PRamoneda]

It is ready! I am free. If you need help with something, let me know. And see you at ISMIR!

[genisplaja]

Thanks @PRamoneda! Added a few minor comments for the Track docstring but other than that looks good to me :) Please fix the mentioned mini-issues and IMO the loader will be ready to go!