2018-11-21 Paul Brossier <piem@aubio.org>

  [ Overview ]

  * VERSION: bump to 0.4.8
  * notes: new option release_drop (gh-203)
  * spectral: new parameters added to filterbank and mfcc (gh-206)
  * python: start documenting module (gh-73, debian #480018), improve build for
  win-amd64 (gh-154, gh-199, gh-208)
  * fixes: prevent crash when using fft sizes unsupported by vDSP (gh-207),
  prevent saturation when down-mixing a multi-channel source (avcodec/ffmpeg)

  [ Fixes ]

  * avcodec: prevent saturation when down-mixing a multi-channel source, emit
  a warning if compiling against avutil < 53 (gh-137), wrap long lines
  * examples/: avoid hiding global and unreachable code
  * fft: limit to r*2*n sizes, with r in [1, 3, 5, 15] (vDSP only) (gh-207)
  * fft: fix reconstruction for odd sizes (fftw only)
  * pvoc: add missing implementations for aubio_pvoc_get_hop/win
  * mathutils: increase ln(2) precision of in freqtomidi/miditofreq
  * wavetable: stop sets playing to 0, add dummy implementation for _load

  [ New features ]

  * src/musicutils.h: new aubio_meltohz, aubio_hztomel, with _htk versions
  * src/spectral/filterbank.h: new set_mel_coeffs, set_mel_coeffs_htk,
  set_power, and set_norm methods, improved set_triangle_bands
  * src/spectral/mfcc.h: new set_scale, set_power, set_norm, set_mel_coeffs,
  set_mel_coeffs_htk, set_mel_coeffs_slaney
  * src/mathutils.h: new fvec_mul
  * src/notes: new option release_drop to prevent missing note-offs (gh-203)

  [ Python module ]

  * fix: rounding to nearest integer in midi2note and freq2note
  * general: supports code generation of setters with none or multiple
  parameters
  * documentation: add docstrings do fvec, cvec, source, sink, pvoc, frequency
  conversion and level detection routines (gh-73, debian #480018)
  * slicing: improve and document slice_source_at_stamps
  * module: new note2freq function, recover error log when raising exceptions
  on failed set_ methods, prevent cyclic import, coding style improvements
  * demos: improve coding style, fix bpm_extract arguments
  * MANIFEST.in: exclude *.pyc, improve patterns

  [ Documentation ]

  * doc/: use sphinx autodoc to load docstrings from aubio module, reorganize
  python module documentation, add a note about double precision, use https
  when possible
  * src/spectral/: update Auditory Toolbox url, update copyright year

  [ Tools ]

  * aubionotes: add --release-drop option
  * aubio: add --release-drop and --silence options to `aubio notes`,
  workaround for -V to really show version (py2)
  * aubiocut: add option --create-first to always create first slice

  [ Tests ]

  * tests/, python/tests: add tests for new methods, check source channel
  down-mix, improve coverage

  [ Build system ]

  * Makefile: disable docs when measuring coverage, add branch coverage
  option, add coverage_zero_counters target, improve html report
  * waf: update to 2.0.12, improve wscript style, prevent shipping some
  generated files
  * python: always show compiler warnings when pre-processing headers,
  workaround to fix code generation for win-amd64 (gh-154, gh-199, gh-208).
  * continuous integration: add azure pipelines, update and improve
  configurations for appveyor, circleci, and travis.