GitLab

This adds a new annotation module with an AnnotationHandler class:

https://gitlab.meridian.cs.dal.ca/public_projects/ketos/blob/v2_annotation/ketos/audio_processing/annotation_new.py

Note that the spectrogram class has not yet been updated to use the new AnnotationHandler class. I suggest we do this before merging into the development branch.

@fsfrazao , what do you think?