Pyqsl

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Features
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- SimulationResult now supports indexing.
- New settings created by tasks are now part of settings
saved with SimulationResult.

Bug Fixes
---------
- Fix a bug where getting only sweeps from simulation result
gave broadcast error.

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Features
--------
- Add a new option to run, use_shallow_copy to enable the use of
shallow copies instead of deep copies.

Bug Fixes
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- When creating dataset, data vars are converted one by one to
prevent casting all of them if a single conversion results in
exception.
- Fix an issue where setting resolution with sweeps converted array-
like setting values to object arrays.

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Bug Fixes
---------
- Fix a bug where all data_vars for a task returning dicts
were converted to objects if any of them needed to be converted.

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Features
--------
- Major improvement on execution through lazy evaluation of
settings with relations. When sweeping, only settings which
dependencies have changed are evaluated.

Bug Fixes
---------
- Fix an error where sweeping a setting with relations
prevented result dataset from being created.