chore(tagging): remove use of deprecated methods
style: PEP8
feat: Timeline support for SlidingWindowFeature.crop()
doc(yaafe): YaafeMFCC.extract docstring
chore: move Gaussian from pyannote.algorithm.util to new pyannote.stats module
doc(Annotation): docstring update
fix: BICClustering now expects SlidingWindowFeature (e.g. YaafeMFCC) as input
feat(wip):  pyannote.algorithm.hac module for hierarchical agglomerative clustering