Extract the USPORF tree structure into python and use it for outlier detection

[MaiRajborirug]

Problem 1:

• Currently, the tree structure only exists in the C++ backend and is mostly inaccessible to the user in python.

Proposal 1:

• Create a new python/cython code that generates USPORF forest/tree structures

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Problem 2:

• There is no outlier/anomaly detection in USPORF yet

Proposal 2

• Create an outlier detection algorithms example which contain:

1. Isolation Forest (IF) from scikit-learn
2. USPORF using affinity sum row of affinity matrix to determine the outliers
3. USPORF uses pathlength function from Isolation Forest paper