Merge tag '0.0.2' into develop

Version 0.0.2
fix(notebook): do not shorten tooltip text
feat(Transcription): get edge time range
fix(setup): package prefix is pyannote-core
fix: end of outside timerange
chore: defaults to inside timerange
chore: PYANNOTE_JSON_TRANSCRIPTION is 'T'
feat(LabelMatrix): IPython HTML display
improve: 10x faster "get_cooccurrence_matrix"
docs: add convention for commit messages
improve: set default format to #%d

Previous « Inconnu_%05d » was an artefact of REPERE evaluation campaign.
fix: remove old constant names

SEGMENT becomes PYANNOTE_SEGMENT.
The same goes for TRACK and LABEL.
refactor(Annotation): remove support for >> operator

BREAKING CHANGE: Timeline tagging is removed.

    One should use pyannote.algorithms.tagging instead.
fix: make label_timeline return a copy

Before this change, adding segments to the returned timeline would
modify the internal _labels attribute!
maintain: remove label mapping data structure
chore: update .new_track() to start at 0 instead of 1
chore: change new track name default prefix to ''
feat(Annotation): add 'collar' param to .smooth()
docs: fix .smooth() docstring
feat: add Scores IPython display