Dwave-system

New Features
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* `ReverseBatchStatesComposite` now inherits from `dimod.Initialized` and by default reverse anneals
* `ReverseAdvanceComposite` now reverse anneals by default with schedule `[[0, 1], [1, 0.35], [9, 0.35], [10, 1]]`

Fixes
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* `EmbeddedStructure` is now deep copy-able
* Embedding composites now raise correct warnings even when chain strengths are provided as a dict

Changes
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* Many `dwave.embedding` utility functions have been migrated to `minorminer`, though they are still imported into their original namespaces

Fixes
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- Doctest now passes

New Features
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* `LeapHybridSampler.min_time_limit` method
* Improved documentation of `LeapHybridDQMSampler`
* More sanity checks on `time_limit` in `LeapHybridDQMSampler`

Changes
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* `LeapHybridDQMSampler.sample_dqm`'s `compressed` keyword argument has been deprecated in favor of `compress`

Fixes
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- Correctly propagate kwargs through `LeapHybridDQMSampler.sample`

New Features
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* `LeapHybridDQMSampler`

Fixes
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* `embed_bqm` now always returns a BQM rather than sometimes returning a view

Changes
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- All samplers now strongly prefer either a QPU or a hybrid solver (288). See [Sampler behavior changes in 1.0.0](https://github.com/dwavesystems/dwave-system/wiki/Sampler-behavior-changes-in-1.0.0) for details.
- Removed deprecated `solver_features` kwarg in `DWaveSampler`
- Removed deprecated `order_by` kwarg in `DWave(Clique)Sampler`