Introduce LearnerND, BalancingLearner.from_product, and several bug fixes.

• Introduce LearnerND (beta)
• Add BalancingLearner.from_product (see learner.ipynb or doc-string for useage example)
• runner.live_info() now shows the learner's efficiency
• runner.task.print_stack() now displays the full traceback
• Introduced learner.tell_many instead of having learner.tell figure out whether multiple points are added (#59)
• Fixed a bug that occured when a Learner1D had extremely narrow features

And more bugs, see v0.4.1...v0.5.0

Rename 'choose_points' -> 'ask' and 'add_point', 'add_data' -> 'tell'

and

• several small bug fixes
• add Jorn Hoofwijk as an author

Fixes a bug in the Learner2D

The Learner2D could be left off in an inconsistent state if the
learner's function errored before the bounds function values
were present in learner.data.

Release with correct licensing information

Previously Christoph Groth was not properly attributed for his contributions.

This release also contains a bugfix for Windows users

Initial interface and algorithm proposal

v0.1.0

Initial interface and algorithm proposal