Update "Using pivaenist in colab" section

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Changed `map_to_wav` to `notes_to_midi`

Changed `map_to_wav` name to `notes_to_midi`

Changed `map_to_wav` name to `notes_to_midi`

Updated a method's name

Updated method call

`generate` is now named `decode`

Modified midi_to_notes to return the transpose DataFrame

Added an exception

Added missing assignation

Minor improvements to README.md

Fixed dimensionality issues in ``encode``

Corrected an error in documentation (README)

Corrected error in documentation

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Fixed parentheses issue

Made in-script documentation of model.py more readable

Made in-script documentation more readable

Fixed issue related to negative duration and step

Minor changes

Set seconds parameter of generate_and_display to -1

Updated default parameters

Added colab link

Reduced default velocity to 50

Included full documentation in the README file

Fixed import statement with the usage of paths

Fixed import statement

Fixed indentation issue

Starting adding documentation to the README file

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Adding images to README file

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Rename audio_methods.py to audio.py

Documenting model.py

Documenting pt. 3

Documenting pt. 2

Started documenting code

Modified sources

Included a TODO