Py-bobyqa

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* Extra parameters to control the trust region radius over multiple restarts, designed for global optimization.
* New input flag :code:`seek_global_minimum` to set sensible default parameters for global optimization. New example script to demonstrate this functionality.
* Bug fix: default trust region radius when scaling variables within bounds.

Initially released as version 1.1a0 on 17 Jul 2018.

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* Extra optional input :code:`args` which passes through arguments for :code:`objfun` (pull request from `logangrado <https://github.com/logangrado>`_).
* Bug fixes: default parameters for reduced initialization cost regime, returning correct value from safety steps, retrieving dependencies during installation.

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* Minor bug fix to trust region subproblem solver (the output :code:`crvmin` is calculated correctly) - this has minimal impact on the performance of Py-BOBYQA.

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* Initial release of Py-BOBYQA