The package is missing license text. (Usually found in a file called LICENSE or COPYING)
While the setup.py mentions "BSD" for the license, it does not specify which variant. There are 6 common variants, with various terms, some more friendly than others. Most Python packages that are BSD-licensed use the "3 clause" variant as described at http://opensource.org/licenses/BSD-3-Clause
However, I can't make any assumptions.