Mutwo-abjad

Changed
- `mutwo.ext-abjad` to `mutwo.abjad`
- `expenvelope.Envelope` to `core_events.TempoEnvelope`

Changed
- `abjad_converters.RMakersSequentialEventToQuantizedAbjadContainer` to `abjad_converters.LeafMakerSequentialEventToQuantizedAbjadContainer`
- `abjad_converters.RMakersSequentialEventToDurationLineBasedQuantizedAbjadContainer` to `abjad_converters.LeafMakerSequentialEventToDurationLineBasedQuantizedAbjadContainer`

Fixed
- quantization of very long leafs by `abjad_converters.LeafMakerSequentialEventToQuantizedAbjadContainer`

Removed
- `abjad-ext-rmakers` dependency

Added
- monkey patches for `abjad` in `mutwo_third_party/abjad`

Changed
- `Hairpin` attachment
- changed bad converter names (XToYConverter -> XToY)

Added
- Cue and WoodwindFinger attachment classes

Changed
- updated to new `mutwo.ext-music` and `mutwo.ext-ekmelily` versions

Added
- conversion of lyrics

Changed
- internal structure