Mutwo.core

Changed
- `start_and_end_time_per_event` property of `SequentialEvent` returns `ranges.Range` objects instead of `tuple`
- renamed `FastSequentialEventToQuantizedAbjadContainerConverter` to `RMakersSequentialEventToQuantizedAbjadContainerConverter`
- renamed `FastSequentialEventToDurationLineBasedQuantizedAbjadContainerConverter` to `RMakersSequentialEventToDurationLineBasedQuantizedAbjadContainerConverter`
- renamed `ComplexSequentialEventToQuantizedAbjadContainerConverter` to `NauertSequentialEventToQuantizedAbjadContainerConverter`
- renamed `ComplexSequentialEventToDurationLineBasedQuantizedAbjadContainerConverter` to `NauertSequentialEventToDurationLineBasedQuantizedAbjadContainerConverter`

Removed
- `mutwo.events.brackets`

Fixed
- order of time signature and grace notes within the abjad converter

Added
- `grace_notes` and `after_grace_notes` to ``NoteLike``
- `grace_notes` and `after_grace_notes` rendering in ``SequentialEventToAbjadVoiceConverter``

Removed
- `mutwo.events.general`

Changed
- give up one-argument-policy for convert method of converter classes
- ``CsoundScoreConverter`` path argument from ``__init__`` moved to ``convert``
- ``CsoundConverter`` path argument from ``__init__`` moved to ``convert``
- ``IsisScoreConverter`` path argument from ``__init__`` moved to ``convert``
- ``IsisConverter`` path argument from ``__init__`` moved to ``convert``
- ``MidiFileConverter`` path argument from ``__init__`` moved to ``convert``
- ``Loudness`` perceived_loudness_in_sone argument from ``__init__`` moved to ``convert``
- `mutwo.converters.frontends.abjad_attachments` to `mutwo.converters.frontends.abjad.attachments`
- `mutwo.converters.frontends.abjad_container_routines` to `mutwo.converters.frontends.abjad.container_routines`
- `mutwo.converters.frontends.abjad_constants` to `mutwo.converters.frontends.abjad.constants`
- return type of `process_leaf` in `mutwo.converters.frontends.abjad.attachments` from `abjad.Leaf` to `typing.Union[abjad.Leaf, typing.Iterable[abjad.Leaf]]`

Added
- `_resort` method for BracketContainer
- `__getitem__` method for BracketContainer
- `force_spanning_of_end_or_end_range` argument to TimeBracket
- `flexible_start_range` and `flexible_end_range` properties to TimeBracket
- `delay` method to TimeBracket

Changed
- OverlappingTimeBracketsError

Added
- MidiPitch
- Partial
- CommonHarmonic
- spectral module in symmetrical with TwoPitchesToCommonHarmonicsConverter

Changed
- '_translate_pitch_class_to_pitch_class_name' method of WesternPitch

Added
- `find_numbers_which_sums_up_to` - function in tools module
- optional 'midi_note' attribute to `MutwoPitchToMidiPitchConverter` converter method in converters.frontends.midi module
- manual glissando to PlayingIndicatorCollection and to abjad_attachments
- manual tie to abjad_attachments
- SetStaffSize to abjad_process_container_routines
- FastSequentialEventToQuantizedAbjadContainerConverter
- FastSequentialEventToDurationLineBasedQuantizedAbjadContainerConverter

Changed
- PlayingIndicatorsConverter in converters.symmetrical.playing_indicators module inherits from converters.abc.EventConverter (and no longer from converters.abc.SymmetricalEventConverter)
- improved AddTimeBracketMarks in abjad_process_container_routines
- renamed SequentialEventToQuantizedAbjadContainerConverter to ComplexSequentialEventToQuantizedAbjadContainerConverter
- renamed SequentialEventToDurationLineBasedQuantizedAbjadContainerConverter to ComplexSequentialEventToDurationLineBasedQuantizedAbjadContainerConverter
- refactored mutwo.converters.frontends.abjad module
- to Python 3.9 as minimal dependency

Removed
- ReaperFileConverter
- reaper_constants