scikit-tda tutorial + data

[KostyaLyman]

removed 'Tutorials' from 'User Guide' toctree

[codecov]

Codecov Report

Merging #25 (3d08860) into master (7c47e79) will not change coverage.
The diff coverage is n/a.

❗ Current head 3d08860 differs from pull request most recent head ac2c34e. Consider uploading reports for the commit ac2c34e to get more accurate results

@@            Coverage Diff            @@
##            master       #25   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files            2         2           
  Lines            5         5           
=========================================
  Hits             5         5           

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