Merge pull request #22 from danmichaelo/relnotes

Add @danmichaelo's changes to the release notes
Merge pull request #21 from danmichaelo/master

Restructure to make installable with Python's setuptools
Merge pull request #23 from danmichaelo/pep8

PEP8 (Python style guide) and continuous integration (CI) with Travis
use inline links to make the raw file more human-readable
Merge branch 'master' of git://github.com/btongminh/mwclient into iwlinks