Dwave-system

New Features
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* New chain strength tuning methods, `uniform_torque_compensation` and `scaled`
* Embedding composites now use `uniform_torque_compensation` to set the default chain strength
* `MockDWaveSampler.sample` now accepts `**kwarg` for greater flexibility when testing

Fixes
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* `embed_bqm` no longer raises an error when `EmbeddedStructure` and `target_adjacency` are both provided. It now raises a deprecation warning

Fixes
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* Fix bug in `DWaveCliqueSampler` chain strength formula

Fixes
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* Improved chain strength calculation in `DWaveCliqueSampler`

New Features
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* `DWaveSampler.to_networkx_graph` method
* A faster implementation of `embed_bqm`
* A `EmbeddedStructure` class.
* Improved chain strength in `DWaveCliqueSampler`

Fixes
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* `DWaveCliqueSampler` now correctly supports legacy software solvers

New Features
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* `DWaveCliqueSampler`
* `order_by` kwarg in `DWaveSampler` constructor
* `LeapHybridSampler` uses BQM serialization version 2.0

New Features
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* Embedding composites no longer block

Fixes
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* `MockDWaveSampler` now has the correct topology
* Fix rounding in anneal schedule validation