v9.1.0
Make RTD table wrap
Add the first() function and Sphinx docs. Vastly improve docs.
Sync with itertool recipes by adding transpose(), matmul(), and factor()~
Reduce README.rst column length and preprocessing
added readme preprocessor to conf.py
Match licenses in "Conditions for Contributors"
Update requirements.txt
Remove use of deprecate 'setup.py test' command
Documentation updates for 9.1.0