* error message

* pep8

* pep8
l

* pep8

* pep8

* travis

* pep8 path

* pep8

* pep8

* added licenses

* pep8

* pep and license

* pep8

* pep8

* pep8

* license

* pep8 + license

* pep8

* pep8

* pep8

* pep8

* version number update