Added functions for dnf format, added simplification tweak
Condensed common code
Rectified errors in doc examples
Added tests
Modified _distribute
Rectified docs error in _is_form
Made docs and formatting changes
pep8 change and .mailmap modification
Merge pull request #11 from smichr/dnf

pep8 change and .mailmap modification
Merge pull request #1730 from srjoglekar246/dnf

Functions for Disjunctive Normal Form
add stirling test to wester
Merge pull request #1744 from smichr/wester

add stirling test to wester