[pyclustering.utils.metric][ccore.utils.metric] F-measure

[annoviko]

Introduction There is a discussion regarding to purity estimation - see #620 . In order to cover this proposal, F-Measure should be implemented.

References Article: The truth of the F-measure. Yutaka Sasaki.

Sub-tasks

• [ ] Implement F-Measure for Python version of the library.
• [ ] Implement F-Measure for C++ version of the library.
• [ ] Implement integration of the C++ into Python.
• [ ] Write documentation for Python version including examples.
• [ ] Write documentation for C++ version including examples.