What's new in 0.23.0

[nicolay-r]

Globalization for any language is the major aspect of 0.23.0, since we announce AREnets and sample-transfer
We tend to generalize some aspects in order to consider other languages than original one (Russian).
We introduce CompoundEntities which may include other entities.

Major

• Nested/Compound entities support! Brat -- support nested entities (CompoundEntity type) [simple implementation] #398
• Detaching networks contrib module AREnets -- separated project for networks contrib part, which provides NN implementation based on Tensorflow #423 -> AREnets
• Appearance of transfer: https://github.com/nicolay-r/arekit-googletrans-sampler

Fixed bugs

• Refactored BRAT parser, fixed bugs for other languages/collections.

Minor

• Evaluation -- ability to extract errors [Backlog] #375
• Internalization (PosTags -- make them optional parameter for neural networks #435)