port to Python 3
rm unused tmp variable
add *.so to .gitignore
add argument to PY_FROMSTRING
fix PY_FROMFORMAT for Python 2
add Nathan Typanski to authors
update readme for Python 3 support
setup.py version bump for Python 3
go back to relative import of init
Merged in nathantypanski/python-iwlib/py3 (pull request #1)

Add Python3 support