New Features

• Add dot-product distance metric.
• Add batch search function supporting multi-threads.

Improvements

• Improve search function.
• Improve graph build heuristic algorithm.
• Improve recall calculation in the benchmark.
• Improve setup python script.

Misc

• Add jupyter-notebook to reproduce benchmark results.
• Refactor source code.
• Fix pypi broken image problem.

Documentation

• Update documents.
• Update API manuals.
• Build n2.readthedocs.io. 🎉

Bug Fix

• Fix python unittest bug

Misc

• Fix travis ci build failure

Misc

• Improve search/build performance
• Refactoring source code
• Linting source code
• Remove unnecessary codes
• Fix bugs
• Update benchmark documents