Mutwo.core

Added
- `curve_shape_tuple` property for `mutwo.core_events.Envelope`
- `copy` method for all events (not only for complex events)

Changed
- refactor `core_parameters.TempoPoint.absolute_tempo_in_beat_per_minute` to `core_parameters.TempoPoint.absolute_tempo_in_beats_per_minute` (use plural for beats)
- use `core_events.Envelope` instead of `expenvelope.Envelope` objects in `core_converters.TempoConverter`
- use `core_events.Envelope` instead of `expenvelope.Envelope` objects in `core_generators.DynamicChoice`

Removed
- deprecated import helper functions in `mutwo.core_utilites` (artefacts from deprecated extension model)
- `expenvelope` dependency

Added
- `core_parameters.abc.SingleValueParameter`
- `core_parameters.abc.SingleNumberParameter`

Added
- various classes to standardise the conversion from mutwo parameters to concrete simple events:
- `core_converters.MutwoParameterDictToSimpleEvent`
- `core_converters.MutwoParameterDictToDuration`
- `core_converters.MutwoParameterDictToKeywordArgument`
- `core_converters.MutwoParameterDict`

Changed
- `new_duration` argument of `mutwo.core_events.SimpleEvent` to `duration`

Added
- `pickle_module` keyword to `compute_lazy` decorated and `PICKLE_MODULE_TO_SEARCH_TUPLE` configuration

Changed
- renamed `mutwo.core_events.constants` to `mutwo.core_events.configurations`

Added
- `parameter_tuple` attribute for `Envelope` class