Move binder badge below title in README

Remove obsolete file

Improve markdown table formatting

Add note about reproducibility of results when RNG is used

Fix variable name in notebook 3.3

Clean Greek punctuation more comprehensively

Bump Python version in notebook metadata

Comprehensive grammar fixes

Fix minor remaining issues across all notebooks

Replace tabs with spaces

Fix long text formatting; expand Greek stopwords list; normalize Greek final sigma

Rewrite notebooks 4.1 to 6.2 to implement various improvements

Further improve code and explanations in notebooks 1.1 to 3.4

Rewrite notebooks 1.1 to 3.4 to implement various improvements

Switch notebooks 6.1 and 6.2