Pennylane-qiskit

New features since last release

- Added noise model and backend options to the devices as well as new observables.
- Added support for all PennyLane observables for calculating expectation values.
- Added (copied & adjusted from pennylane-forest) test for the expectation values.
- Added the necessary DefaultQubit device for comparison.
- Added logging.

Improvements

- Changed expval_queue to obs_queue and expectations to observables as per latest pennylane.
- Reversed qregs to match the default qubit device behavior.
- Renamed devices correctly.
- Made wires explicit. If num_wires of operation is 0 then use the whole system as wires!
- Renamed the IBMQ device from `qiskit.ibm` to `qiskit.ibmq`.

Fixed

- Fixed the Unitary gate.
- Fixed the token loading and the shots.
- Fixed and updated to qiskit v0.10.1
- Fixed the valid expectation values of all devices. Along with it tests where fixed.

Removed

- Removed the IBMQX_TOKEN import and replace with the correct args.
- Removed the unconditional make coverage.
- Removed default qubit device, this is not tested in this package!

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Removed

- Removed the `LegacySimulatorsQiskitDevice` as this isn't supported in `qiskit` anymore.

Improvements

- updated to `qiskit` version `0.10.*`.

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Added

- Added the noise model to `BasicAerQiskitDevice` and `AerQiskitDevice` with unit tests (13)
- Added unit tests for the docs (7/20)

Fixed

- Fixed the ''multiple'' `backends` keyword bug (13).
- Fixed the `par_domain` of the operations (real valued parameters) in `pos.py` (21)
- Fixed documentation problems
- Started to 'fix' ''low'' code quality due to type hints with codacy (15)
- Small typos and code cleanups

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New features

- `AerQiskitDevice` and `LegacySimulatorQiskitDevice` with tests

Fixed

- Readme & documentation
- `setup.py`
- Code style clean-ups & code cleaning.
- Build setup with travis CI
- Removed unsied `num_runs` kwargs
- Fixed the overlapping kwargs with
- Better tests taken from the _ProjectQ_ plugin
- remove the sleep after computation.

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Release 2018-12-23

New features

- The device `IbmQQiskitDevice` now can load the `ibmqx_token` from the environment variabe `IBMQX_TOKEN`

Improvements

- Renamed `psops` to `qisktops`
- The setup/build requirements are now read from `requirements.txt`. The file is included now in the distribution file.
- Due to changes in qiskit (0.7.0) the Device `AerDevice` must be correctly termed to `BasicAerDevice`
- Due to the removal of `qiskit.unroll.CircuitBackend` the complete plugin logic needed an overhaul. Now the
`QuantumCircuit` is used in conjunction with the new converters `dag_to_circuit` and `circuit_to_dag`
as well as the usage of the base class `Instruction`. We hope that this change will work for most cases.

Fixed

- The Readme: links and the usage of _device_ instead of _provider_, to stay in PennyLane-lingo
- Update to qiskit 0.7.0 made changes necessary: import location have changes