Merge tag '0.0.3' into develop

Version 0.0.3
style: PEP8
fix(setup): switch to MIT license
fix(doc): update link to documentation
git: ignore emacs temporary files
improve: make labels() method returns Unknown last
Update README.md
style: PEP8
feat: add durationToSamples (and vice-versa)
fix(Transcription): fix cropping corner cases

fixes issue #1
fix(Annotation): fix JSON loading
chore(matrix): remove deprecated method iter_values()
doc: add instructions for notebook display support
doc: add documentation for Scores
doc: add CHANGELOG for v0.0.4
merge: fix conflict in README
Merge tag '0.0.4' into develop

Version 0.0.4
Merge branch 'master' into develop
doc: add CHANGELOG for v0.0.5
Merge branch 'release/0.0.5'