Python 3
try to repair travis
modernize test suite
Merge pull request #62 from makinacorpus/py3

Py3
Preparing release 2.17
Back to development: 2.18
changelog fix
Preparing release 2.18
Back to development: 2.19
fix travis
Preparing release 2.19
Back to development: 2.20
Merge branch 'author-master'

Conflicts:
	setup.py
	src/spynner/tests/test_doctests.py
Enable tests on 3.3