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* First release on PyPI.
* Functions available:
- ad_create: create a text ad place words in placeholders
- ad_from_string: split a long string to shorter string that fit into
given slots
- kw_generate: generate keywords from lists of products and words
- url_utm_ga: generate a UTM-tagged URL for Google Analytics tracking
- word_frequency: measure the absolute and weighted frequency of words in
collection of documents